15321505343161 has 2 divisors, whose sum is σ = 15321505343162. Its totient is φ = 15321505343160.

The previous prime is 15321505343141. The next prime is 15321505343167. The reversal of 15321505343161 is 16134350512351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11116622905600 + 4204882437561 = 3334160^2 + 2050581^2 .

It is a cyclic number.

It is not a de Polignac number, because 15321505343161 - 2²³ = 15321496954553 is a prime.

It is a super-2 number, since 2×15321505343161² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15321505343167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7660752671580 + 7660752671581.

It is an arithmetic number, because the mean of its divisors is an integer number (7660752671581).

Almost surely, 2^{15321505343161} is an apocalyptic number.

It is an amenable number.

15321505343161 is a deficient number, since it is larger than the sum of its proper divisors (1).

15321505343161 is an equidigital number, since it uses as much as digits as its factorization.

15321505343161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162000, while the sum is 40.

The spelling of 15321505343161 in words is "fifteen trillion, three hundred twenty-one billion, five hundred five million, three hundred forty-three thousand, one hundred sixty-one".