15990313 has 8 divisors (see below), whose sum is σ = 16743168. Its totient is φ = 15242304.

The previous prime is 15990307. The next prime is 15990323. The reversal of 15990313 is 31309951.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15990313 - 2¹³ = 15982121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15990323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6720 + ... + 8782.

It is an arithmetic number, because the mean of its divisors is an integer number (2092896).

Almost surely, 2^15990313 is an apocalyptic number.

It is an amenable number.

15990313 is a deficient number, since it is larger than the sum of its proper divisors (752855).

15990313 is a wasteful number, since it uses less digits than its factorization.

15990313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2423.

The product of its (nonzero) digits is 3645, while the sum is 31.

The square root of 15990313 is about 3998.7889416672. The cubic root of 15990313 is about 251.9333461493.

The spelling of 15990313 in words is "fifteen million, nine hundred ninety thousand, three hundred thirteen".