13152531 has 24 divisors (see below), whose sum is σ = 20585664. Its totient is φ = 7447440.

The previous prime is 13152511. The next prime is 13152563. The reversal of 13152531 is 13525131.

It is not a de Polignac number, because 13152531 - 2⁹ = 13152019 is a prime.

It is a super-2 number, since 2×13152531² = 345978143411922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 13152498 and 13152507.

It is not an unprimeable number, because it can be changed into a prime (13152511) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18916 + ... + 19598.

It is an arithmetic number, because the mean of its divisors is an integer number (857736).

Almost surely, 2^13152531 is an apocalyptic number.

13152531 is a deficient number, since it is larger than the sum of its proper divisors (7433133).

13152531 is a wasteful number, since it uses less digits than its factorization.

13152531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831 (or 824 counting only the distinct ones).

The product of its digits is 450, while the sum is 21.

The square root of 13152531 is about 3626.6418350866. The cubic root of 13152531 is about 236.0495144121.

Adding to 13152531 its reverse (13525131), we get a palindrome (26677662).

The spelling of 13152531 in words is "thirteen million, one hundred fifty-two thousand, five hundred thirty-one".