215531025520079 has 2 divisors, whose sum is σ = 215531025520080. Its totient is φ = 215531025520078.

The previous prime is 215531025520009. The next prime is 215531025520177. The reversal of 215531025520079 is 970025520135512.

215531025520079 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215531025520079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215531025520009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107765512760039 + 107765512760040.

It is an arithmetic number, because the mean of its divisors is an integer number (107765512760040).

Almost surely, 2^{215531025520079} is an apocalyptic number.

215531025520079 is a deficient number, since it is larger than the sum of its proper divisors (1).

215531025520079 is an equidigital number, since it uses as much as digits as its factorization.

215531025520079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 945000, while the sum is 47.

The spelling of 215531025520079 in words is "two hundred fifteen trillion, five hundred thirty-one billion, twenty-five million, five hundred twenty thousand, seventy-nine".