312122139 has 32 divisors (see below), whose sum is σ = 502272000. Its totient is φ = 168420384.

The previous prime is 312122119. The next prime is 312122143. The reversal of 312122139 is 931221213.

It is not a de Polignac number, because 312122139 - 2⁸ = 312121883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (312122119) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 142152 + ... + 144330.

It is an arithmetic number, because the mean of its divisors is an integer number (15696000).

Almost surely, 2^312122139 is an apocalyptic number.

312122139 is a deficient number, since it is larger than the sum of its proper divisors (190149861).

312122139 is a wasteful number, since it uses less digits than its factorization.

312122139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2567.

The product of its digits is 648, while the sum is 24.

The square root of 312122139 is about 17666.9787739726. The cubic root of 312122139 is about 678.3307811535.

The spelling of 312122139 in words is "three hundred twelve million, one hundred twenty-two thousand, one hundred thirty-nine".