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252820885 = 550564177
BaseRepresentation
bin11110001000110…
…11110110010101
3122121201122001111
433010123312111
51004210232020
641030455021
76156641062
oct1704336625
9577648044
10252820885
1111a790089
1270804471
13404bc675
1425811c69
15172ded5a
hexf11bd95

252820885 has 4 divisors (see below), whose sum is σ = 303385068. Its totient is φ = 202256704.

The previous prime is 252820873. The next prime is 252820891. The reversal of 252820885 is 588028252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 96020401 + 156800484 = 9799^2 + 12522^2 .

It is a cyclic number.

It is not a de Polignac number, because 252820885 - 223 = 244432277 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25282084 + ... + 25282093.

It is an arithmetic number, because the mean of its divisors is an integer number (75846267).

Almost surely, 2252820885 is an apocalyptic number.

It is an amenable number.

252820885 is a deficient number, since it is larger than the sum of its proper divisors (50564183).

252820885 is an equidigital number, since it uses as much as digits as its factorization.

252820885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50564182.

The product of its (nonzero) digits is 102400, while the sum is 40.

The square root of 252820885 is about 15900.3422919131. The cubic root of 252820885 is about 632.3210636014.

The spelling of 252820885 in words is "two hundred fifty-two million, eight hundred twenty thousand, eight hundred eighty-five".

Divisors: 1 5 50564177 252820885