15913965 has 16 divisors (see below), whose sum is σ = 26005248. Its totient is φ = 8306496.

The previous prime is 15913957. The next prime is 15913967. The reversal of 15913965 is 56931951.

It is not a de Polignac number, because 15913965 - 2³ = 15913957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15913967) 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, 10582 + ... + 11991.

It is an arithmetic number, because the mean of its divisors is an integer number (1625328).

Almost surely, 2^15913965 is an apocalyptic number.

15913965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15913965 is a deficient number, since it is larger than the sum of its proper divisors (10091283).

15913965 is a wasteful number, since it uses less digits than its factorization.

15913965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22628.

The product of its digits is 36450, while the sum is 39.

The square root of 15913965 is about 3989.2311289270. The cubic root of 15913965 is about 251.5317425585.

The spelling of 15913965 in words is "fifteen million, nine hundred thirteen thousand, nine hundred sixty-five".