312031031 has 4 divisors (see below), whose sum is σ = 336033432. Its totient is φ = 288028632.

The previous prime is 312030997. The next prime is 312031121. The reversal of 312031031 is 130130213.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 312031031 - 2⁶ = 312030967 is a prime.

It is a super-2 number, since 2×312031031² = 194726728613845922, 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 = 312030997 and 312031015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312031631) 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, 12001181 + ... + 12001206.

It is an arithmetic number, because the mean of its divisors is an integer number (84008358).

Almost surely, 2^312031031 is an apocalyptic number.

312031031 is a deficient number, since it is larger than the sum of its proper divisors (24002401).

312031031 is a wasteful number, since it uses less digits than its factorization.

312031031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24002400.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 312031031 is about 17664.4001030321. The cubic root of 312031031 is about 678.2647734733.

Adding to 312031031 its reverse (130130213), we get a palindrome (442161244).

The spelling of 312031031 in words is "three hundred twelve million, thirty-one thousand, thirty-one".