25520455 has 16 divisors (see below), whose sum is σ = 32103360. Its totient is φ = 19438848.

The previous prime is 25520437. The next prime is 25520479. The reversal of 25520455 is 55402552.

It is a cyclic number.

It is not a de Polignac number, because 25520455 - 2⁵ = 25520423 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35641 + ... + 36349.

It is an arithmetic number, because the mean of its divisors is an integer number (2006460).

Almost surely, 2^25520455 is an apocalyptic number.

25520455 is a deficient number, since it is larger than the sum of its proper divisors (6582905).

25520455 is a wasteful number, since it uses less digits than its factorization.

25520455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050.

The product of its (nonzero) digits is 10000, while the sum is 28.

The square root of 25520455 is about 5051.7774099816. Note that the first 3 decimals coincide. The cubic root of 25520455 is about 294.4169466298.

The spelling of 25520455 in words is "twenty-five million, five hundred twenty thousand, four hundred fifty-five".