315139501 has 4 divisors (see below), whose sum is σ = 316048032. Its totient is φ = 314230972.

The previous prime is 315139499. The next prime is 315139511. The reversal of 315139501 is 105931513.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 105931513 = 293 ⋅361541.

It is a cyclic number.

It is not a de Polignac number, because 315139501 - 2¹ = 315139499 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 315139501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315139511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 453745 + ... + 454438.

It is an arithmetic number, because the mean of its divisors is an integer number (79012008).

Almost surely, 2^315139501 is an apocalyptic number.

It is an amenable number.

315139501 is a deficient number, since it is larger than the sum of its proper divisors (908531).

315139501 is an equidigital number, since it uses as much as digits as its factorization.

315139501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908530.

The product of its (nonzero) digits is 2025, while the sum is 28.

The square root of 315139501 is about 17752.1689097417. The cubic root of 315139501 is about 680.5096388515.

It can be divided in two parts, 31513 and 9501, that added together give a palindrome (41014).

The spelling of 315139501 in words is "three hundred fifteen million, one hundred thirty-nine thousand, five hundred one".