315224220517 has 4 divisors (see below), whose sum is σ = 315400423660. Its totient is φ = 315048017376.

The previous prime is 315224220457. The next prime is 315224220547. The reversal of 315224220517 is 715022422513.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 300946599396 + 14277621121 = 548586^2 + 119489^2 .

It is a cyclic number.

It is not a de Polignac number, because 315224220517 - 2¹⁵ = 315224187749 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 (315224220547) 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, 88098888 + ... + 88102465.

It is an arithmetic number, because the mean of its divisors is an integer number (78850105915).

Almost surely, 2^315224220517 is an apocalyptic number.

It is an amenable number.

315224220517 is a deficient number, since it is larger than the sum of its proper divisors (176203143).

315224220517 is a wasteful number, since it uses less digits than its factorization.

315224220517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176203142.

The product of its (nonzero) digits is 33600, while the sum is 34.

The spelling of 315224220517 in words is "three hundred fifteen billion, two hundred twenty-four million, two hundred twenty thousand, five hundred seventeen".