3131612331 has 8 divisors (see below), whose sum is σ = 4176427584. Its totient is φ = 2087269320.

The previous prime is 3131612269. The next prime is 3131612333. The reversal of 3131612331 is 1332161313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3131612331 - 2¹⁷ = 3131481259 is a prime.

It is a super-2 number, since 2×3131612331² = 19613991583342507122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3131612333) 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 7 ways as a sum of consecutive naturals, for example, 102285 + ... + 129326.

It is an arithmetic number, because the mean of its divisors is an integer number (522053448).

Almost surely, 2^3131612331 is an apocalyptic number.

3131612331 is a deficient number, since it is larger than the sum of its proper divisors (1044815253).

3131612331 is a wasteful number, since it uses less digits than its factorization.

3131612331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236121.

The product of its digits is 972, while the sum is 24.

The square root of 3131612331 is about 55960.8106713975. The cubic root of 3131612331 is about 1463.0393198890.

Adding to 3131612331 its reverse (1332161313), we get a palindrome (4463773644).

The spelling of 3131612331 in words is "three billion, one hundred thirty-one million, six hundred twelve thousand, three hundred thirty-one".