315522231253621 has 64 divisors (see below), whose sum is σ = 394965865857024. Its totient is φ = 245927054131200.

The previous prime is 315522231253601. The next prime is 315522231253631. The reversal of 315522231253621 is 126352132225513.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315522231253621 is a prime.

It is a super-2 number, since 2×315522231253621² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315522231253601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 138815125 + ... + 141069781.

It is an arithmetic number, because the mean of its divisors is an integer number (6171341654016).

Almost surely, 2^{315522231253621} is an apocalyptic number.

It is an amenable number.

315522231253621 is a deficient number, since it is larger than the sum of its proper divisors (79443634603403).

315522231253621 is a wasteful number, since it uses less digits than its factorization.

315522231253621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2255050.

The product of its digits is 648000, while the sum is 43.

The spelling of 315522231253621 in words is "three hundred fifteen trillion, five hundred twenty-two billion, two hundred thirty-one million, two hundred fifty-three thousand, six hundred twenty-one".