312403403421 has 40 divisors (see below), whose sum is σ = 473292107904. Its totient is φ = 205319292480.

The previous prime is 312403403407. The next prime is 312403403461. The reversal of 312403403421 is 124304304213.

312403403421 is a `hidden beast` number, since 31 + 240 + 340 + 34 + 21 = 666.

It is not a de Polignac number, because 312403403421 - 2⁶ = 312403403357 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312403403461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 13866556 + ... + 13889066.

Almost surely, 2^312403403421 is an apocalyptic number.

It is an amenable number.

312403403421 is a deficient number, since it is larger than the sum of its proper divisors (160888704483).

312403403421 is a wasteful number, since it uses less digits than its factorization.

312403403421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24943 (or 24934 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 312403403421 its reverse (124304304213), we get a palindrome (436707707634).

The spelling of 312403403421 in words is "three hundred twelve billion, four hundred three million, four hundred three thousand, four hundred twenty-one".