15213038236681 has 2 divisors, whose sum is σ = 15213038236682. Its totient is φ = 15213038236680.

The previous prime is 15213038236661. The next prime is 15213038236727. The reversal of 15213038236681 is 18663283031251.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12580613111056 + 2632425125625 = 3546916^2 + 1622475^2 .

It is a cyclic number.

It is not a de Polignac number, because 15213038236681 - 2¹⁷ = 15213038105609 is a prime.

It is a super-2 number, since 2×15213038236681² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15213038236661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7606519118340 + 7606519118341.

It is an arithmetic number, because the mean of its divisors is an integer number (7606519118341).

Almost surely, 2^{15213038236681} is an apocalyptic number.

It is an amenable number.

15213038236681 is a deficient number, since it is larger than the sum of its proper divisors (1).

15213038236681 is an equidigital number, since it uses as much as digits as its factorization.

15213038236681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1244160, while the sum is 49.

The spelling of 15213038236681 in words is "fifteen trillion, two hundred thirteen billion, thirty-eight million, two hundred thirty-six thousand, six hundred eighty-one".