12515014381 has 2 divisors, whose sum is σ = 12515014382. Its totient is φ = 12515014380.

The previous prime is 12515014363. The next prime is 12515014387. The reversal of 12515014381 is 18341051521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8901922500 + 3613091881 = 94350^2 + 60109^2 .

It is a cyclic number.

It is not a de Polignac number, because 12515014381 - 2⁵ = 12515014349 is a prime.

It is a super-2 number, since 2×12515014381² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12515014387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6257507190 + 6257507191.

It is an arithmetic number, because the mean of its divisors is an integer number (6257507191).

Almost surely, 2^12515014381 is an apocalyptic number.

It is an amenable number.

12515014381 is a deficient number, since it is larger than the sum of its proper divisors (1).

12515014381 is an equidigital number, since it uses as much as digits as its factorization.

12515014381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4800, while the sum is 31.

The spelling of 12515014381 in words is "twelve billion, five hundred fifteen million, fourteen thousand, three hundred eighty-one".