313132120031 has 4 divisors (see below), whose sum is σ = 313150533864. Its totient is φ = 313113706200.

The previous prime is 313132120001. The next prime is 313132120057. The reversal of 313132120031 is 130021231313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130021231313 = 157 ⋅828160709.

It is a cyclic number.

It is not a de Polignac number, because 313132120031 - 2¹⁸ = 313131857887 is a prime.

It is a super-2 number, since 2×313132120031² (a number of 24 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 = 313132119985 and 313132120012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313132120001) 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, 9181385 + ... + 9215426.

It is an arithmetic number, because the mean of its divisors is an integer number (78287633466).

Almost surely, 2^313132120031 is an apocalyptic number.

313132120031 is a deficient number, since it is larger than the sum of its proper divisors (18413833).

313132120031 is a wasteful number, since it uses less digits than its factorization.

313132120031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18413832.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 313132120031 its reverse (130021231313), we get a palindrome (443153351344).

The spelling of 313132120031 in words is "three hundred thirteen billion, one hundred thirty-two million, one hundred twenty thousand, thirty-one".