31013001131 has 4 divisors (see below), whose sum is σ = 35443429872. Its totient is φ = 26582572392.

The previous prime is 31013001113. The next prime is 31013001163. The reversal of 31013001131 is 13110031013.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13110031013 = 6263 ⋅2093251.

It is a cyclic number.

It is not a de Polignac number, because 31013001131 - 2⁶ = 31013001067 is a prime.

It is a super-2 number, since 2×31013001131² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31013001191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2215214360 + ... + 2215214373.

It is an arithmetic number, because the mean of its divisors is an integer number (8860857468).

Almost surely, 2^31013001131 is an apocalyptic number.

31013001131 is a deficient number, since it is larger than the sum of its proper divisors (4430428741).

31013001131 is an equidigital number, since it uses as much as digits as its factorization.

31013001131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4430428740.

The product of its (nonzero) digits is 27, while the sum is 14.

Adding to 31013001131 its reverse (13110031013), we get a palindrome (44123032144).

The spelling of 31013001131 in words is "thirty-one billion, thirteen million, one thousand, one hundred thirty-one".