315104105521 has 2 divisors, whose sum is σ = 315104105522. Its totient is φ = 315104105520.

The previous prime is 315104105513. The next prime is 315104105573. The reversal of 315104105521 is 125501401513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 293872410000 + 21231695521 = 542100^2 + 145711^2 .

It is a cyclic number.

It is not a de Polignac number, because 315104105521 - 2³ = 315104105513 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 315104105521.

It is not a weakly prime, because it can be changed into another prime (315104105021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157552052760 + 157552052761.

It is an arithmetic number, because the mean of its divisors is an integer number (157552052761).

Almost surely, 2^315104105521 is an apocalyptic number.

It is an amenable number.

315104105521 is a deficient number, since it is larger than the sum of its proper divisors (1).

315104105521 is an equidigital number, since it uses as much as digits as its factorization.

315104105521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3000, while the sum is 28.

The spelling of 315104105521 in words is "three hundred fifteen billion, one hundred four million, one hundred five thousand, five hundred twenty-one".