13500052531 has 4 divisors (see below), whose sum is σ = 15428631472. Its totient is φ = 11571473592.

The previous prime is 13500052523. The next prime is 13500052541. The reversal of 13500052531 is 13525000531.

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

It is not a de Polignac number, because 13500052531 - 2³ = 13500052523 is a prime.

It is a super-2 number, since 2×13500052531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13500052496 and 13500052505.

It is not an unprimeable number, because it can be changed into a prime (13500052541) 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, 964289460 + ... + 964289473.

It is an arithmetic number, because the mean of its divisors is an integer number (3857157868).

Almost surely, 2^13500052531 is an apocalyptic number.

13500052531 is a deficient number, since it is larger than the sum of its proper divisors (1928578941).

13500052531 is an equidigital number, since it uses as much as digits as its factorization.

13500052531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1928578940.

The product of its (nonzero) digits is 2250, while the sum is 25.

The spelling of 13500052531 in words is "thirteen billion, five hundred million, fifty-two thousand, five hundred thirty-one".