15015050251081 has 2 divisors, whose sum is σ = 15015050251082. Its totient is φ = 15015050251080.

The previous prime is 15015050250887. The next prime is 15015050251087. The reversal of 15015050251081 is 18015205051051.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10920275413056 + 4094774838025 = 3304584^2 + 2023555^2 .

It is a cyclic number.

It is not a de Polignac number, because 15015050251081 - 2²⁵ = 15015016696649 is a prime.

It is a super-2 number, since 2×15015050251081² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15015050251087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7507525125540 + 7507525125541.

It is an arithmetic number, because the mean of its divisors is an integer number (7507525125541).

Almost surely, 2^{15015050251081} is an apocalyptic number.

It is an amenable number.

15015050251081 is a deficient number, since it is larger than the sum of its proper divisors (1).

15015050251081 is an equidigital number, since it uses as much as digits as its factorization.

15015050251081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10000, while the sum is 34.

The spelling of 15015050251081 in words is "fifteen trillion, fifteen billion, fifty million, two hundred fifty-one thousand, eighty-one".