25221964 has 6 divisors (see below), whose sum is σ = 44138444. Its totient is φ = 12610980.

The previous prime is 25221953. The next prime is 25221971. The reversal of 25221964 is 46912252.

It is a super-2 number, since 2×25221964² = 1272294936034592, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3152742 + ... + 3152749.

Almost surely, 2^25221964 is an apocalyptic number.

It is an amenable number.

25221964 is a deficient number, since it is larger than the sum of its proper divisors (18916480).

25221964 is a wasteful number, since it uses less digits than its factorization.

25221964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6305495 (or 6305493 counting only the distinct ones).

The product of its digits is 8640, while the sum is 31.

The square root of 25221964 is about 5022.1473494911. The cubic root of 25221964 is about 293.2645942007.

The spelling of 25221964 in words is "twenty-five million, two hundred twenty-one thousand, nine hundred sixty-four".