313215345 has 12 divisors (see below), whose sum is σ = 542906676. Its totient is φ = 167048160.

The previous prime is 313215317. The next prime is 313215349. The reversal of 313215345 is 543512313.

313215345 is a `hidden beast` number, since 313 + 2 + 1 + 5 + 345 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 69105969 + 244109376 = 8313^2 + 15624^2 .

It is not a de Polignac number, because 313215345 - 2⁹ = 313214833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (313215349) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3480126 + ... + 3480215.

It is an arithmetic number, because the mean of its divisors is an integer number (45242223).

Almost surely, 2^313215345 is an apocalyptic number.

It is an amenable number.

313215345 is a deficient number, since it is larger than the sum of its proper divisors (229691331).

313215345 is a wasteful number, since it uses less digits than its factorization.

313215345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6960352 (or 6960349 counting only the distinct ones).

The product of its digits is 5400, while the sum is 27.

The square root of 313215345 is about 17697.8909760457. The cubic root of 313215345 is about 679.1218082374.

Adding to 313215345 its reverse (543512313), we get a palindrome (856727658).

The spelling of 313215345 in words is "three hundred thirteen million, two hundred fifteen thousand, three hundred forty-five".