312100431 has 4 divisors (see below), whose sum is σ = 416133912. Its totient is φ = 208066952.

The previous prime is 312100427. The next prime is 312100447. The reversal of 312100431 is 134001213.

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 312100431 - 2² = 312100427 is a prime.

It is a super-2 number, since 2×312100431² = 194813358060771522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 312100431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312100421) 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, 52016736 + ... + 52016741.

It is an arithmetic number, because the mean of its divisors is an integer number (104033478).

Almost surely, 2^312100431 is an apocalyptic number.

312100431 is a deficient number, since it is larger than the sum of its proper divisors (104033481).

312100431 is a wasteful number, since it uses less digits than its factorization.

312100431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104033480.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 312100431 is about 17666.3643967852. The cubic root of 312100431 is about 678.3150548890.

Adding to 312100431 its reverse (134001213), we get a palindrome (446101644).

The spelling of 312100431 in words is "three hundred twelve million, one hundred thousand, four hundred thirty-one".