25220064 has 24 divisors (see below), whose sum is σ = 66202920. Its totient is φ = 8406656.

The previous prime is 25220057. The next prime is 25220077. The reversal of 25220064 is 46002252.

25220064 is nontrivially palindromic in base 11.

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 25220064.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131259 + ... + 131450.

It is an arithmetic number, because the mean of its divisors is an integer number (2758455).

Almost surely, 2^25220064 is an apocalyptic number.

25220064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

25220064 is an abundant number, since it is smaller than the sum of its proper divisors (40982856).

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

25220064 is a wasteful number, since it uses less digits than its factorization.

25220064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262722 (or 262714 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 25220064 is about 5021.9581838163. The cubic root of 25220064 is about 293.2572300277.

The spelling of 25220064 in words is "twenty-five million, two hundred twenty thousand, sixty-four".