315045224155621 has 2 divisors, whose sum is σ = 315045224155622. Its totient is φ = 315045224155620.

The previous prime is 315045224155483. The next prime is 315045224155661. The reversal of 315045224155621 is 126551422540513.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164352143600100 + 150693080555521 = 12819990^2 + 12275711^2 .

It is a cyclic number.

It is not a de Polignac number, because 315045224155621 - 2²⁵ = 315045190601189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315045224155661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157522612077810 + 157522612077811.

It is an arithmetic number, because the mean of its divisors is an integer number (157522612077811).

Almost surely, 2^{315045224155621} is an apocalyptic number.

It is an amenable number.

315045224155621 is a deficient number, since it is larger than the sum of its proper divisors (1).

315045224155621 is an equidigital number, since it uses as much as digits as its factorization.

315045224155621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440000, while the sum is 46.

The spelling of 315045224155621 in words is "three hundred fifteen trillion, forty-five billion, two hundred twenty-four million, one hundred fifty-five thousand, six hundred twenty-one".