25571513 has 4 divisors (see below), whose sum is σ = 27896208. Its totient is φ = 23246820.

The previous prime is 25571489. The next prime is 25571527. The reversal of 25571513 is 31517552.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25571513 - 2⁸ = 25571257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25571813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1162331 + ... + 1162352.

It is an arithmetic number, because the mean of its divisors is an integer number (6974052).

Almost surely, 2^25571513 is an apocalyptic number.

It is an amenable number.

25571513 is a deficient number, since it is larger than the sum of its proper divisors (2324695).

25571513 is a wasteful number, since it uses less digits than its factorization.

25571513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2324694.

The product of its digits is 5250, while the sum is 29.

The square root of 25571513 is about 5056.8283538202. The cubic root of 25571513 is about 294.6131595196.

The spelling of 25571513 in words is "twenty-five million, five hundred seventy-one thousand, five hundred thirteen".