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25506043 = 31182013
BaseRepresentation
bin110000101001…
…1000011111011
31202222211201021
41201103003323
523012143133
62310403311
7426540433
oct141230373
952884637
1025506043
1113441082
128660537
135390644
14355d2c3
15238c52d
hex18530fb

25506043 has 4 divisors (see below), whose sum is σ = 25588368. Its totient is φ = 25423720.

The previous prime is 25505989. The next prime is 25506049. The reversal of 25506043 is 34060552.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-25506043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25505999 and 25506017.

It is not an unprimeable number, because it can be changed into a prime (25506049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40696 + ... + 41317.

It is an arithmetic number, because the mean of its divisors is an integer number (6397092).

Almost surely, 225506043 is an apocalyptic number.

25506043 is a deficient number, since it is larger than the sum of its proper divisors (82325).

25506043 is an equidigital number, since it uses as much as digits as its factorization.

25506043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82324.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 25506043 is about 5050.3507798964. The cubic root of 25506043 is about 294.3615148070.

Adding to 25506043 its reverse (34060552), we get a palindrome (59566595).

The spelling of 25506043 in words is "twenty-five million, five hundred six thousand, forty-three".

Divisors: 1 311 82013 25506043