31534131 has 4 divisors (see below), whose sum is σ = 42045512. Its totient is φ = 21022752.

The previous prime is 31534121. The next prime is 31534141. The reversal of 31534131 is 13143513.

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

It is an interprime number because it is at equal distance from previous prime (31534121) and next prime (31534141).

It is not a de Polignac number, because 31534131 - 2⁶ = 31534067 is a prime.

It is a super-2 number, since 2×31534131² = 1988802835850322, 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 = 31534098 and 31534107.

It is not an unprimeable number, because it can be changed into a prime (31534121) 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, 5255686 + ... + 5255691.

It is an arithmetic number, because the mean of its divisors is an integer number (10511378).

Almost surely, 2^31534131 is an apocalyptic number.

31534131 is a deficient number, since it is larger than the sum of its proper divisors (10511381).

31534131 is a wasteful number, since it uses less digits than its factorization.

31534131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10511380.

The product of its digits is 540, while the sum is 21.

The square root of 31534131 is about 5615.5258881070. The cubic root of 31534131 is about 315.9320041436.

Adding to 31534131 its reverse (13143513), we get a palindrome (44677644).

The spelling of 31534131 in words is "thirty-one million, five hundred thirty-four thousand, one hundred thirty-one".