312920881 has 8 divisors (see below), whose sum is σ = 385133504. Its totient is φ = 247585680.

The previous prime is 312920869. The next prime is 312920891. The reversal of 312920881 is 188029213.

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 312920881 - 2⁵ = 312920849 is a prime.

It is a super-2 number, since 2×312920881² = 195838955531632322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (312920801) 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, 1719255 + ... + 1719436.

It is an arithmetic number, because the mean of its divisors is an integer number (48141688).

Almost surely, 2^312920881 is an apocalyptic number.

It is an amenable number.

312920881 is a deficient number, since it is larger than the sum of its proper divisors (72212623).

312920881 is a wasteful number, since it uses less digits than its factorization.

312920881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3438711.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 312920881 is about 17689.5698364884. The cubic root of 312920881 is about 678.9089199606.

The spelling of 312920881 in words is "three hundred twelve million, nine hundred twenty thousand, eight hundred eighty-one".