315152135021 has 2 divisors, whose sum is σ = 315152135022. Its totient is φ = 315152135020.

The previous prime is 315152134991. The next prime is 315152135057. The reversal of 315152135021 is 120531251513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 263770579396 + 51381555625 = 513586^2 + 226675^2 .

It is a cyclic number.

It is not a de Polignac number, because 315152135021 - 2¹⁰ = 315152133997 is a prime.

It is a super-2 number, since 2×315152135021² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315152135071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157576067510 + 157576067511.

It is an arithmetic number, because the mean of its divisors is an integer number (157576067511).

Almost surely, 2^315152135021 is an apocalyptic number.

It is an amenable number.

315152135021 is a deficient number, since it is larger than the sum of its proper divisors (1).

315152135021 is an equidigital number, since it uses as much as digits as its factorization.

315152135021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4500, while the sum is 29.

Adding to 315152135021 its reverse (120531251513), we get a palindrome (435683386534).

The spelling of 315152135021 in words is "three hundred fifteen billion, one hundred fifty-two million, one hundred thirty-five thousand, twenty-one".