25211664 has 30 divisors (see below), whose sum is σ = 70558046. Its totient is φ = 8403840.

The previous prime is 25211647. The next prime is 25211687. The reversal of 25211664 is 46611252.

It can be written as a sum of positive squares in only one way, i.e., 24920064 + 291600 = 4992^2 + 540^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 87397 + ... + 87684.

Almost surely, 2^25211664 is an apocalyptic number.

25211664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

25211664 is an abundant number, since it is smaller than the sum of its proper divisors (45346382).

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

25211664 is a wasteful number, since it uses less digits than its factorization.

25211664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175095 (or 175086 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 25211664 is about 5021.1217870113. The cubic root of 25211664 is about 293.2246681982.

The spelling of 25211664 in words is "twenty-five million, two hundred eleven thousand, six hundred sixty-four".