31130131 has 4 divisors (see below), whose sum is σ = 31269952. Its totient is φ = 30990312.

The previous prime is 31130101. The next prime is 31130147. The reversal of 31130131 is 13103113.

It is a happy number.

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 31130131 - 2¹³ = 31121939 is a prime.

It is a super-2 number, since 2×31130131² = 1938170112154322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31130101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69576 + ... + 70021.

It is an arithmetic number, because the mean of its divisors is an integer number (7817488).

Almost surely, 2^31130131 is an apocalyptic number.

31130131 is a deficient number, since it is larger than the sum of its proper divisors (139821).

31130131 is a wasteful number, since it uses less digits than its factorization.

31130131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139820.

The product of its (nonzero) digits is 27, while the sum is 13.

The square root of 31130131 is about 5579.4382333708. The cubic root of 31130131 is about 314.5770118325.

Adding to 31130131 its reverse (13103113), we get a palindrome (44233244).

The spelling of 31130131 in words is "thirty-one million, one hundred thirty thousand, one hundred thirty-one".