15220956 has 12 divisors (see below), whose sum is σ = 35515592. Its totient is φ = 5073648.

The previous prime is 15220921. The next prime is 15220973. The reversal of 15220956 is 65902251.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

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, 634195 + ... + 634218.

Almost surely, 2^15220956 is an apocalyptic number.

It is an amenable number.

15220956 is an abundant number, since it is smaller than the sum of its proper divisors (20294636).

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

15220956 is a wasteful number, since it uses less digits than its factorization.

15220956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1268420 (or 1268418 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 15220956 is about 3901.4043625341. The cubic root of 15220956 is about 247.8262527385.

The spelling of 15220956 in words is "fifteen million, two hundred twenty thousand, nine hundred fifty-six".