15427682521 has 2 divisors, whose sum is σ = 15427682522. Its totient is φ = 15427682520.

The previous prime is 15427682471. The next prime is 15427682527. The reversal of 15427682521 is 12528672451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15046456896 + 381225625 = 122664^2 + 19525^2 .

It is a cyclic number.

It is not a de Polignac number, because 15427682521 - 2¹³ = 15427674329 is a prime.

It is not a weakly prime, because it can be changed into another prime (15427682527) 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, 7713841260 + 7713841261.

It is an arithmetic number, because the mean of its divisors is an integer number (7713841261).

Almost surely, 2^15427682521 is an apocalyptic number.

It is an amenable number.

15427682521 is a deficient number, since it is larger than the sum of its proper divisors (1).

15427682521 is an equidigital number, since it uses as much as digits as its factorization.

15427682521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 268800, while the sum is 43.

The spelling of 15427682521 in words is "fifteen billion, four hundred twenty-seven million, six hundred eighty-two thousand, five hundred twenty-one".