3138556531 has 4 divisors (see below), whose sum is σ = 3423879864. Its totient is φ = 2853233200.

The previous prime is 3138556513. The next prime is 3138556537. The reversal of 3138556531 is 1356558313.

3138556531 is digitally balanced in base 2, 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 3138556531 - 2⁷ = 3138556403 is a prime.

It is a super-2 number, since 2×3138556531² = 19701074196565507922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3138556537) 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, 142661650 + ... + 142661671.

It is an arithmetic number, because the mean of its divisors is an integer number (855969966).

Almost surely, 2^3138556531 is an apocalyptic number.

3138556531 is a deficient number, since it is larger than the sum of its proper divisors (285323333).

3138556531 is a wasteful number, since it uses less digits than its factorization.

3138556531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285323332.

The product of its digits is 162000, while the sum is 40.

The square root of 3138556531 is about 56022.8215194487. The cubic root of 3138556531 is about 1464.1199280344.

The spelling of 3138556531 in words is "three billion, one hundred thirty-eight million, five hundred fifty-six thousand, five hundred thirty-one".