22015256 has 8 divisors (see below), whose sum is σ = 41278620. Its totient is φ = 11007624.

The previous prime is 22015249. The next prime is 22015271. The reversal of 22015256 is 65251022.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1375946 + ... + 1375961.

Almost surely, 2^22015256 is an apocalyptic number.

It is an amenable number.

22015256 is a deficient number, since it is larger than the sum of its proper divisors (19263364).

22015256 is a wasteful number, since it uses less digits than its factorization.

22015256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2751913 (or 2751909 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 22015256 is about 4692.0417730451. The cubic root of 22015256 is about 280.2686876634.

Adding to 22015256 its reverse (65251022), we get a palindrome (87266278).

The spelling of 22015256 in words is "twenty-two million, fifteen thousand, two hundred fifty-six".