312123031 has 8 divisors (see below), whose sum is σ = 346080528. Its totient is φ = 279096000.

The previous prime is 312123023. The next prime is 312123061. The reversal of 312123031 is 130321213.

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

It is a cyclic number.

It is not a de Polignac number, because 312123031 - 2³ = 312123023 is a prime.

It is a super-2 number, since 2×312123031² = 194841572961253922, 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 = 312122996 and 312123014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312123061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231910 + ... + 233251.

It is an arithmetic number, because the mean of its divisors is an integer number (43260066).

Almost surely, 2^312123031 is an apocalyptic number.

312123031 is a deficient number, since it is larger than the sum of its proper divisors (33957497).

312123031 is a wasteful number, since it uses less digits than its factorization.

312123031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465233.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 312123031 is about 17667.0040187916. The cubic root of 312123031 is about 678.3314273434.

Adding to 312123031 its reverse (130321213), we get a palindrome (442444244).

It can be divided in two parts, 31212 and 3031, that added together give a palindrome (34243).

The spelling of 312123031 in words is "three hundred twelve million, one hundred twenty-three thousand, thirty-one".