1516315232531 has 4 divisors (see below), whose sum is σ = 1654162071864. Its totient is φ = 1378468393200.

The previous prime is 1516315232483. The next prime is 1516315232533. The reversal of 1516315232531 is 1352325136151.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1516315232531 - 2²⁶ = 1516248123667 is a prime.

It is a super-2 number, since 2×1516315232531² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1516315232533) 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, 68923419650 + ... + 68923419671.

It is an arithmetic number, because the mean of its divisors is an integer number (413540517966).

Almost surely, 2^{1516315232531} is an apocalyptic number.

1516315232531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1516315232531 is a deficient number, since it is larger than the sum of its proper divisors (137846839333).

1516315232531 is a wasteful number, since it uses less digits than its factorization.

1516315232531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137846839332.

The product of its digits is 81000, while the sum is 38.

The spelling of 1516315232531 in words is "one trillion, five hundred sixteen billion, three hundred fifteen million, two hundred thirty-two thousand, five hundred thirty-one".