315652132421 has 2 divisors, whose sum is σ = 315652132422. Its totient is φ = 315652132420.

The previous prime is 315652132417. The next prime is 315652132487. The reversal of 315652132421 is 124231256513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 250111012321 + 65541120100 = 500111^2 + 256010^2 .

It is a cyclic number.

It is not a de Polignac number, because 315652132421 - 2² = 315652132417 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315652132321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157826066210 + 157826066211.

It is an arithmetic number, because the mean of its divisors is an integer number (157826066211).

Almost surely, 2^315652132421 is an apocalyptic number.

It is an amenable number.

315652132421 is a deficient number, since it is larger than the sum of its proper divisors (1).

315652132421 is an equidigital number, since it uses as much as digits as its factorization.

315652132421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43200, while the sum is 35.

Adding to 315652132421 its reverse (124231256513), we get a palindrome (439883388934).

The spelling of 315652132421 in words is "three hundred fifteen billion, six hundred fifty-two million, one hundred thirty-two thousand, four hundred twenty-one".