312315421 has 8 divisors (see below), whose sum is σ = 351698688. Its totient is φ = 274764000.

The previous prime is 312315403. The next prime is 312315427. The reversal of 312315421 is 124513213.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 312315421 - 2⁹ = 312314909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 312315392 and 312315401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312315427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 457600 + ... + 458281.

It is an arithmetic number, because the mean of its divisors is an integer number (43962336).

Almost surely, 2^312315421 is an apocalyptic number.

312315421 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

312315421 is a deficient number, since it is larger than the sum of its proper divisors (39383267).

312315421 is a wasteful number, since it uses less digits than its factorization.

312315421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 915923.

The product of its digits is 720, while the sum is 22.

The square root of 312315421 is about 17672.4480760307. The cubic root of 312315421 is about 678.4707713046.

Adding to 312315421 its reverse (124513213), we get a palindrome (436828634).

The spelling of 312315421 in words is "three hundred twelve million, three hundred fifteen thousand, four hundred twenty-one".