31312303131 has 8 divisors (see below), whose sum is σ = 42878108944. Its totient is φ = 20310683040.

The previous prime is 31312303123. The next prime is 31312303189. The reversal of 31312303131 is 13130321313.

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

It is not a de Polignac number, because 31312303131 - 2³ = 31312303123 is a prime.

It is a super-2 number, since 2×31312303131² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31312303098 and 31312303107.

It is not an unprimeable number, because it can be changed into a prime (31312703131) 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 7 ways as a sum of consecutive naturals, for example, 141046300 + ... + 141046521.

It is an arithmetic number, because the mean of its divisors is an integer number (5359763618).

Almost surely, 2^31312303131 is an apocalyptic number.

31312303131 is a deficient number, since it is larger than the sum of its proper divisors (11565805813).

31312303131 is a wasteful number, since it uses less digits than its factorization.

31312303131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282092861.

The product of its (nonzero) digits is 486, while the sum is 21.

Adding to 31312303131 its reverse (13130321313), we get a palindrome (44442624444).

The spelling of 31312303131 in words is "thirty-one billion, three hundred twelve million, three hundred three thousand, one hundred thirty-one".