15222856 has 16 divisors (see below), whose sum is σ = 31137840. Its totient is φ = 6919440.

The previous prime is 15222839. The next prime is 15222887. The reversal of 15222856 is 65822251.

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, 86406 + ... + 86581.

It is an arithmetic number, because the mean of its divisors is an integer number (1946115).

Almost surely, 2^15222856 is an apocalyptic number.

It is an amenable number.

15222856 is an abundant number, since it is smaller than the sum of its proper divisors (15914984).

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

15222856 is a wasteful number, since it uses less digits than its factorization.

15222856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173004 (or 173000 counting only the distinct ones).

The product of its digits is 9600, while the sum is 31.

The square root of 15222856 is about 3901.6478569958. The cubic root of 15222856 is about 247.8365641865.

The spelling of 15222856 in words is "fifteen million, two hundred twenty-two thousand, eight hundred fifty-six".