16972815 has 16 divisors (see below), whose sum is σ = 27207648. Its totient is φ = 9035136.

The previous prime is 16972771. The next prime is 16972819. The reversal of 16972815 is 51827961.

It is not a de Polignac number, because 16972815 - 2⁸ = 16972559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16972819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14637 + ... + 15753.

It is an arithmetic number, because the mean of its divisors is an integer number (1700478).

Almost surely, 2^16972815 is an apocalyptic number.

16972815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16972815 is a deficient number, since it is larger than the sum of its proper divisors (10234833).

16972815 is a wasteful number, since it uses less digits than its factorization.

16972815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2138.

The product of its digits is 30240, while the sum is 39.

The square root of 16972815 is about 4119.8076411405. The cubic root of 16972815 is about 256.9910265506.

The spelling of 16972815 in words is "sixteen million, nine hundred seventy-two thousand, eight hundred fifteen".