15222756 has 12 divisors (see below), whose sum is σ = 35519792. Its totient is φ = 5074248.

The previous prime is 15222719. The next prime is 15222761. The reversal of 15222756 is 65722251.

15222756 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

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, 634270 + ... + 634293.

Almost surely, 2^15222756 is an apocalyptic number.

It is an amenable number.

15222756 is an abundant number, since it is smaller than the sum of its proper divisors (20297036).

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

15222756 is a wasteful number, since it uses less digits than its factorization.

15222756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1268570 (or 1268568 counting only the distinct ones).

The product of its digits is 8400, while the sum is 30.

The square root of 15222756 is about 3901.6350418767. The cubic root of 15222756 is about 247.8360215001.

It can be divided in two parts, 1522 and 2756, that added together give a triangular number (4278 = T₉₂).

The spelling of 15222756 in words is "fifteen million, two hundred twenty-two thousand, seven hundred fifty-six".