15215086121251 has 2 divisors, whose sum is σ = 15215086121252. Its totient is φ = 15215086121250.

The previous prime is 15215086121173. The next prime is 15215086121363. The reversal of 15215086121251 is 15212168051251.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15215086121251 - 2³⁵ = 15180726382883 is a prime.

It is not a weakly prime, because it can be changed into another prime (15215086125251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7607543060625 + 7607543060626.

It is an arithmetic number, because the mean of its divisors is an integer number (7607543060626).

Almost surely, 2^{15215086121251} is an apocalyptic number.

15215086121251 is a deficient number, since it is larger than the sum of its proper divisors (1).

15215086121251 is an equidigital number, since it uses as much as digits as its factorization.

15215086121251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48000, while the sum is 40.

The spelling of 15215086121251 in words is "fifteen trillion, two hundred fifteen billion, eighty-six million, one hundred twenty-one thousand, two hundred fifty-one".