15216868 has 6 divisors (see below), whose sum is σ = 26629526. Its totient is φ = 7608432.

The previous prime is 15216841. The next prime is 15216889. The reversal of 15216868 is 86861251.

It can be written as a sum of positive squares in only one way, i.e., 11614464 + 3602404 = 3408^2 + 1898^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1902105 + ... + 1902112.

Almost surely, 2^15216868 is an apocalyptic number.

It is an amenable number.

15216868 is a deficient number, since it is larger than the sum of its proper divisors (11412658).

15216868 is a wasteful number, since it uses less digits than its factorization.

15216868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3804221 (or 3804219 counting only the distinct ones).

The product of its digits is 23040, while the sum is 37.

The square root of 15216868 is about 3900.8804134451. The cubic root of 15216868 is about 247.8040639344.

Subtracting from 15216868 its product of digits (23040), we obtain a triangular number (15193828 = T₅₅₁₂).

It can be divided in two parts, 152 and 16868, that added together give a triangular number (17020 = T₁₈₄).

The spelling of 15216868 in words is "fifteen million, two hundred sixteen thousand, eight hundred sixty-eight".