312130191 has 8 divisors (see below), whose sum is σ = 417066624. Its totient is φ = 207640280.

The previous prime is 312130177. The next prime is 312130193. The reversal of 312130191 is 191031213.

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 312130191 - 2¹⁴ = 312113807 is a prime.

It is a super-2 number, since 2×312130191² = 194850512267392962, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312130193) 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, 109995 + ... + 112796.

It is an arithmetic number, because the mean of its divisors is an integer number (52133328).

Almost surely, 2^312130191 is an apocalyptic number.

312130191 is a deficient number, since it is larger than the sum of its proper divisors (104936433).

312130191 is a wasteful number, since it uses less digits than its factorization.

312130191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223261.

The product of its (nonzero) digits is 162, while the sum is 21.

The square root of 312130191 is about 17667.2066552695. The cubic root of 312130191 is about 678.3366142039.

The spelling of 312130191 in words is "three hundred twelve million, one hundred thirty thousand, one hundred ninety-one".