315522305281 has 2 divisors, whose sum is σ = 315522305282. Its totient is φ = 315522305280.

The previous prime is 315522305243. The next prime is 315522305291. The reversal of 315522305281 is 182503225513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 309849202881 + 5673102400 = 556641^2 + 75320^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315522305281 is a prime.

It is a super-2 number, since 2×315522305281² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 315522305281.

It is not a weakly prime, because it can be changed into another prime (315522305291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157761152640 + 157761152641.

It is an arithmetic number, because the mean of its divisors is an integer number (157761152641).

Almost surely, 2^315522305281 is an apocalyptic number.

It is an amenable number.

315522305281 is a deficient number, since it is larger than the sum of its proper divisors (1).

315522305281 is an equidigital number, since it uses as much as digits as its factorization.

315522305281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72000, while the sum is 37.

The spelling of 315522305281 in words is "three hundred fifteen billion, five hundred twenty-two million, three hundred five thousand, two hundred eighty-one".