25520553 has 24 divisors (see below), whose sum is σ = 41090400. Its totient is φ = 15168384.

The previous prime is 25520527. The next prime is 25520557. The reversal of 25520553 is 35502552.

It is not a de Polignac number, because 25520553 - 2⁶ = 25520489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25520557) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1483 + ... + 7296.

It is an arithmetic number, because the mean of its divisors is an integer number (1712100).

Almost surely, 2^25520553 is an apocalyptic number.

It is an amenable number.

25520553 is a deficient number, since it is larger than the sum of its proper divisors (15569847).

25520553 is a wasteful number, since it uses less digits than its factorization.

25520553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8821 (or 8818 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 27.

The square root of 25520553 is about 5051.7871095287. The cubic root of 25520553 is about 294.4173234886.

The spelling of 25520553 in words is "twenty-five million, five hundred twenty thousand, five hundred fifty-three".