312311403 has 16 divisors (see below), whose sum is σ = 489900960. Its totient is φ = 195959808.

The previous prime is 312311401. The next prime is 312311431. The reversal of 312311403 is 304113213.

312311403 is a `hidden beast` number, since 31 + 231 + 1 + 403 = 666.

It is not a de Polignac number, because 312311403 - 2¹ = 312311401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (312311401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 339750 + ... + 340667.

It is an arithmetic number, because the mean of its divisors is an integer number (30618810).

Almost surely, 2^312311403 is an apocalyptic number.

312311403 is a deficient number, since it is larger than the sum of its proper divisors (177589557).

312311403 is a wasteful number, since it uses less digits than its factorization.

312311403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680443 (or 680437 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 312311403 is about 17672.3343958856. The cubic root of 312311403 is about 678.4678617383.

Adding to 312311403 its reverse (304113213), we get a palindrome (616424616).

The spelling of 312311403 in words is "three hundred twelve million, three hundred eleven thousand, four hundred three".