2515597421 has 2 divisors, whose sum is σ = 2515597422. Its totient is φ = 2515597420.

The previous prime is 2515597411. The next prime is 2515597451. The reversal of 2515597421 is 1247955152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1392409225 + 1123188196 = 37315^2 + 33514^2 .

It is a cyclic number.

It is not a de Polignac number, because 2515597421 - 2¹⁴ = 2515581037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2515597411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1257798710 + 1257798711.

It is an arithmetic number, because the mean of its divisors is an integer number (1257798711).

Almost surely, 2^2515597421 is an apocalyptic number.

It is an amenable number.

2515597421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2515597421 is an equidigital number, since it uses as much as digits as its factorization.

2515597421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 126000, while the sum is 41.

The square root of 2515597421 is about 50155.7316864185. The cubic root of 2515597421 is about 1360.0254862943.

The spelling of 2515597421 in words is "two billion, five hundred fifteen million, five hundred ninety-seven thousand, four hundred twenty-one".