15132121619 has 2 divisors, whose sum is σ = 15132121620. Its totient is φ = 15132121618.

The previous prime is 15132121591. The next prime is 15132121621. The reversal of 15132121619 is 91612123151.

It is a strong prime.

It is an emirp because it is prime and its reverse (91612123151) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15132121619 - 2²⁸ = 14863686163 is a prime.

It is a super-2 number, since 2×15132121619² (a number of 21 digits) contains 22 as substring.

Together with 15132121621, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15132121019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7566060809 + 7566060810.

It is an arithmetic number, because the mean of its divisors is an integer number (7566060810).

Almost surely, 2^15132121619 is an apocalyptic number.

15132121619 is a deficient number, since it is larger than the sum of its proper divisors (1).

15132121619 is an equidigital number, since it uses as much as digits as its factorization.

15132121619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 32.

The spelling of 15132121619 in words is "fifteen billion, one hundred thirty-two million, one hundred twenty-one thousand, six hundred nineteen".