312313631 has 4 divisors (see below), whose sum is σ = 356929872. Its totient is φ = 267697392.

The previous prime is 312313571. The next prime is 312313643. The reversal of 312313631 is 136313213.

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: 136313213 = 9341 ⋅14593.

It is a cyclic number.

It is not a de Polignac number, because 312313631 - 2²² = 308119327 is a prime.

It is a super-2 number, since 2×312313631² = 195079608216808322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312313597 and 312313606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312313691) 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, 22308110 + ... + 22308123.

It is an arithmetic number, because the mean of its divisors is an integer number (89232468).

Almost surely, 2^312313631 is an apocalyptic number.

312313631 is a deficient number, since it is larger than the sum of its proper divisors (44616241).

312313631 is an equidigital number, since it uses as much as digits as its factorization.

312313631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44616240.

The product of its digits is 972, while the sum is 23.

The square root of 312313631 is about 17672.3974321539. The cubic root of 312313631 is about 678.4694751097.

Adding to 312313631 its reverse (136313213), we get a palindrome (448626844).

The spelling of 312313631 in words is "three hundred twelve million, three hundred thirteen thousand, six hundred thirty-one".