2515862316521 has 2 divisors, whose sum is σ = 2515862316522. Its totient is φ = 2515862316520.

The previous prime is 2515862316467. The next prime is 2515862316533. The reversal of 2515862316521 is 1256132685152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2411843166121 + 104019150400 = 1553011^2 + 322520^2 .

It is a cyclic number.

It is not a de Polignac number, because 2515862316521 - 2¹⁴ = 2515862300137 is a prime.

It is not a weakly prime, because it can be changed into another prime (2515862319521) 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, 1257931158260 + 1257931158261.

It is an arithmetic number, because the mean of its divisors is an integer number (1257931158261).

Almost surely, 2^{2515862316521} is an apocalyptic number.

It is an amenable number.

2515862316521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2515862316521 is an equidigital number, since it uses as much as digits as its factorization.

2515862316521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864000, while the sum is 47.

The spelling of 2515862316521 in words is "two trillion, five hundred fifteen billion, eight hundred sixty-two million, three hundred sixteen thousand, five hundred twenty-one".