15212997 has 12 divisors (see below), whose sum is σ = 22189024. Its totient is φ = 10042920.

The previous prime is 15212983. The next prime is 15213001. The reversal of 15212997 is 79921251.

It is not a de Polignac number, because 15212997 - 2⁶ = 15212933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15212947) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7279 + ... + 9132.

Almost surely, 2^15212997 is an apocalyptic number.

It is an amenable number.

15212997 is a deficient number, since it is larger than the sum of its proper divisors (6976027).

15212997 is a wasteful number, since it uses less digits than its factorization.

15212997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16520 (or 16517 counting only the distinct ones).

The product of its digits is 11340, while the sum is 36.

The square root of 15212997 is about 3900.3842118438. The cubic root of 15212997 is about 247.7830492971.

The spelling of 15212997 in words is "fifteen million, two hundred twelve thousand, nine hundred ninety-seven".