25315590 has 32 divisors (see below), whose sum is σ = 61002720. Its totient is φ = 6723584.

The previous prime is 25315583. The next prime is 25315607. The reversal of 25315590 is 9551352.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 6502 + ... + 9638.

It is an arithmetic number, because the mean of its divisors is an integer number (1906335).

Almost surely, 2^25315590 is an apocalyptic number.

25315590 is an abundant number, since it is smaller than the sum of its proper divisors (35687130).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25315590 is a wasteful number, since it uses less digits than its factorization.

25315590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3416.

The product of its (nonzero) digits is 6750, while the sum is 30.

The square root of 25315590 is about 5031.4600266722. The cubic root of 25315590 is about 293.6270201976.

It can be divided in two parts, 25 and 315590, that added together give a triangular number (315615 = T₇₉₄).

The spelling of 25315590 in words is "twenty-five million, three hundred fifteen thousand, five hundred ninety".