315465211421 has 2 divisors, whose sum is σ = 315465211422. Its totient is φ = 315465211420.

The previous prime is 315465211349. The next prime is 315465211427. The reversal of 315465211421 is 124112564513.

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., 199585562500 + 115879648921 = 446750^2 + 340411^2 .

It is a cyclic number.

It is not a de Polignac number, because 315465211421 - 2²⁶ = 315398102557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315465211427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157732605710 + 157732605711.

It is an arithmetic number, because the mean of its divisors is an integer number (157732605711).

Almost surely, 2^315465211421 is an apocalyptic number.

It is an amenable number.

315465211421 is a deficient number, since it is larger than the sum of its proper divisors (1).

315465211421 is an equidigital number, since it uses as much as digits as its factorization.

315465211421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28800, while the sum is 35.

Adding to 315465211421 its reverse (124112564513), we get a palindrome (439577775934).

The spelling of 315465211421 in words is "three hundred fifteen billion, four hundred sixty-five million, two hundred eleven thousand, four hundred twenty-one".