315245545221 has 8 divisors (see below), whose sum is σ = 420393957984. Its totient is φ = 210130414640.

The previous prime is 315245545193. The next prime is 315245545229. The reversal of 315245545221 is 122545542513.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315245545221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 315245545221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315245545229) 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, 8298435 + ... + 8336336.

It is an arithmetic number, because the mean of its divisors is an integer number (52549244748).

Almost surely, 2^315245545221 is an apocalyptic number.

It is an amenable number.

315245545221 is a deficient number, since it is larger than the sum of its proper divisors (105148412763).

315245545221 is a wasteful number, since it uses less digits than its factorization.

315245545221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16641091.

The product of its digits is 240000, while the sum is 39.

The spelling of 315245545221 in words is "three hundred fifteen billion, two hundred forty-five million, five hundred forty-five thousand, two hundred twenty-one".