312431403 has 4 divisors (see below), whose sum is σ = 416575208. Its totient is φ = 208287600.

The previous prime is 312431381. The next prime is 312431407. The reversal of 312431403 is 304134213.

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

It is not a de Polignac number, because 312431403 - 2¹⁰ = 312430379 is a prime.

It is a super-2 number, since 2×312431403² = 195226763161096818, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 312431403.

It is not an unprimeable number, because it can be changed into a prime (312431407) 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, 52071898 + ... + 52071903.

It is an arithmetic number, because the mean of its divisors is an integer number (104143802).

Almost surely, 2^312431403 is an apocalyptic number.

312431403 is a deficient number, since it is larger than the sum of its proper divisors (104143805).

312431403 is a wasteful number, since it uses less digits than its factorization.

312431403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104143804.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 312431403 is about 17675.7292070228. The cubic root of 312431403 is about 678.5547469404.

Adding to 312431403 its reverse (304134213), we get a palindrome (616565616).

The spelling of 312431403 in words is "three hundred twelve million, four hundred thirty-one thousand, four hundred three".