215364714979 has 2 divisors, whose sum is σ = 215364714980. Its totient is φ = 215364714978.

The previous prime is 215364714941. The next prime is 215364714997. The reversal of 215364714979 is 979417463512.

It is a happy number.

Together with next prime (215364714997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215364714979 is a prime.

It is not a weakly prime, because it can be changed into another prime (215364714179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107682357489 + 107682357490.

It is an arithmetic number, because the mean of its divisors is an integer number (107682357490).

Almost surely, 2^215364714979 is an apocalyptic number.

215364714979 is a deficient number, since it is larger than the sum of its proper divisors (1).

215364714979 is an equidigital number, since it uses as much as digits as its factorization.

215364714979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11430720, while the sum is 58.

The spelling of 215364714979 in words is "two hundred fifteen billion, three hundred sixty-four million, seven hundred fourteen thousand, nine hundred seventy-nine".