13057531 has 4 divisors (see below), whose sum is σ = 13179672. Its totient is φ = 12935392.

The previous prime is 13057523. The next prime is 13057543. The reversal of 13057531 is 13575031.

13057531 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 13057531 - 2³ = 13057523 is a prime.

It is a super-2 number, since 2×13057531² = 340998231631922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13057496 and 13057505.

It is not an unprimeable number, because it can be changed into a prime (13057501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60910 + ... + 61123.

It is an arithmetic number, because the mean of its divisors is an integer number (3294918).

Almost surely, 2^13057531 is an apocalyptic number.

13057531 is a deficient number, since it is larger than the sum of its proper divisors (122141).

13057531 is a wasteful number, since it uses less digits than its factorization.

13057531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122140.

The product of its (nonzero) digits is 1575, while the sum is 25.

The square root of 13057531 is about 3613.5205824791. The cubic root of 13057531 is about 235.4798163982.

It can be divided in two parts, 1305 and 7531, that added together give a square (8836 = 94²).

The spelling of 13057531 in words is "thirteen million, fifty-seven thousand, five hundred thirty-one".