315515553131 has 4 divisors (see below), whose sum is σ = 315518959632. Its totient is φ = 315512146632.

The previous prime is 315515553103. The next prime is 315515553173. The reversal of 315515553131 is 131355515513.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131355515513 = 8087 ⋅16242799.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315515553131 is a prime.

It is a super-2 number, since 2×315515553131² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (315515553931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1560320 + ... + 1750893.

It is an arithmetic number, because the mean of its divisors is an integer number (78879739908).

Almost surely, 2^315515553131 is an apocalyptic number.

315515553131 is a deficient number, since it is larger than the sum of its proper divisors (3406501).

315515553131 is an equidigital number, since it uses as much as digits as its factorization.

315515553131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3406500.

The product of its digits is 84375, while the sum is 38.

The spelling of 315515553131 in words is "three hundred fifteen billion, five hundred fifteen million, five hundred fifty-three thousand, one hundred thirty-one".