312601217 has 4 divisors (see below), whose sum is σ = 312641796. Its totient is φ = 312560640.

The previous prime is 312601207. The next prime is 312601231. The reversal of 312601217 is 712106213.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 28206721 + 284394496 = 5311^2 + 16864^2 .

It is a cyclic number.

It is not a de Polignac number, because 312601217 - 2⁸ = 312600961 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312601192 and 312601201.

It is not an unprimeable number, because it can be changed into a prime (312601207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4784 + ... + 25457.

It is an arithmetic number, because the mean of its divisors is an integer number (78160449).

Almost surely, 2^312601217 is an apocalyptic number.

It is an amenable number.

312601217 is a deficient number, since it is larger than the sum of its proper divisors (40579).

312601217 is a wasteful number, since it uses less digits than its factorization.

312601217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40578.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 312601217 is about 17680.5321469689. The cubic root of 312601217 is about 678.6776616288.

The spelling of 312601217 in words is "three hundred twelve million, six hundred one thousand, two hundred seventeen".