312643855 has 8 divisors (see below), whose sum is σ = 397241712. Its totient is φ = 235402368.

The previous prime is 312643847. The next prime is 312643883. The reversal of 312643855 is 558346213.

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 312643855 - 2³ = 312643847 is a prime.

It is a super-2 number, since 2×312643855² = 195492360138522050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1838997 + ... + 1839166.

It is an arithmetic number, because the mean of its divisors is an integer number (49655214).

Almost surely, 2^312643855 is an apocalyptic number.

312643855 is a deficient number, since it is larger than the sum of its proper divisors (84597857).

312643855 is a wasteful number, since it uses less digits than its factorization.

312643855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3678185.

The product of its digits is 86400, while the sum is 37.

The square root of 312643855 is about 17681.7378953541. The cubic root of 312643855 is about 678.7085168537.

The spelling of 312643855 in words is "three hundred twelve million, six hundred forty-three thousand, eight hundred fifty-five".