15317990 has 16 divisors (see below), whose sum is σ = 29023920. Its totient is φ = 5804640.

The previous prime is 15317989. The next prime is 15318001. The reversal of 15317990 is 9971351.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 15317990.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40121 + ... + 40500.

It is an arithmetic number, because the mean of its divisors is an integer number (1813995).

Almost surely, 2^15317990 is an apocalyptic number.

15317990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15317990 is a deficient number, since it is larger than the sum of its proper divisors (13705930).

15317990 is a wasteful number, since it uses less digits than its factorization.

15317990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80647.

The product of its (nonzero) digits is 8505, while the sum is 35.

The square root of 15317990 is about 3913.8203842282. The cubic root of 15317990 is about 248.3517705733.

The spelling of 15317990 in words is "fifteen million, three hundred seventeen thousand, nine hundred ninety".