312051213 has 6 divisors (see below), whose sum is σ = 450740654. Its totient is φ = 208034136.

The previous prime is 312051209. The next prime is 312051217. The reversal of 312051213 is 312150213.

It is an interprime number because it is at equal distance from previous prime (312051209) and next prime (312051217).

It can be written as a sum of positive squares in only one way, i.e., 171557604 + 140493609 = 13098^2 + 11853^2 .

It is not a de Polignac number, because 312051213 - 2² = 312051209 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312051217) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17336170 + ... + 17336187.

Almost surely, 2^312051213 is an apocalyptic number.

It is an amenable number.

312051213 is a deficient number, since it is larger than the sum of its proper divisors (138689441).

312051213 is a wasteful number, since it uses less digits than its factorization.

312051213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34672363 (or 34672360 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 312051213 is about 17664.9713557651. The cubic root of 312051213 is about 678.2793964255.

The spelling of 312051213 in words is "three hundred twelve million, fifty-one thousand, two hundred thirteen".