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238819025 = 529552761
BaseRepresentation
bin11100011110000…
…01011011010001
3121122101021010002
432033001123101
5442114202100
635410415345
75626633244
oct1617013321
9548337102
10238819025
111128972a5
1267b91555
133a629443
1423a0925b
1515e762d5
hexe3c16d1

238819025 has 6 divisors (see below), whose sum is σ = 296135622. Its totient is φ = 191055200.

The previous prime is 238819019. The next prime is 238819027. The reversal of 238819025 is 520918832.

238819025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 19571776 + 219247249 = 4424^2 + 14807^2 .

It is not a de Polignac number, because 238819025 - 218 = 238556881 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 238819025.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238819027) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4776356 + ... + 4776405.

It is an arithmetic number, because the mean of its divisors is an integer number (49355937).

Almost surely, 2238819025 is an apocalyptic number.

238819025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

238819025 is a deficient number, since it is larger than the sum of its proper divisors (57316597).

238819025 is an equidigital number, since it uses as much as digits as its factorization.

238819025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9552771 (or 9552766 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 238819025 is about 15453.7705754939. The cubic root of 238819025 is about 620.4255013591.

The spelling of 238819025 in words is "two hundred thirty-eight million, eight hundred nineteen thousand, twenty-five".

Divisors: 1 5 25 9552761 47763805 238819025