15222072 has 32 divisors (see below), whose sum is σ = 40294800. Its totient is φ = 4775424.

The previous prime is 15222049. The next prime is 15222079. The reversal of 15222072 is 27022251.

It is a happy number.

It is a super-2 number, since 2×15222072² = 463422951946368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15222079) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18247 + ... + 19062.

Almost surely, 2^15222072 is an apocalyptic number.

15222072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15222072 is an abundant number, since it is smaller than the sum of its proper divisors (25072728).

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

15222072 is a wasteful number, since it uses less digits than its factorization.

15222072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37335 (or 37331 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 15222072 is about 3901.5473853332. The cubic root of 15222072 is about 247.8323094614.

The spelling of 15222072 in words is "fifteen million, two hundred twenty-two thousand, seventy-two".