215901355679 has 2 divisors, whose sum is σ = 215901355680. Its totient is φ = 215901355678.

The previous prime is 215901355661. The next prime is 215901355697. The reversal of 215901355679 is 976553109512.

Together with next prime (215901355697) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (215901355661) and next prime (215901355697).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215901355679 is a prime.

It is a super-2 number, since 2×215901355679² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 215901355679.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215901355609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107950677839 + 107950677840.

It is an arithmetic number, because the mean of its divisors is an integer number (107950677840).

Almost surely, 2^215901355679 is an apocalyptic number.

215901355679 is a deficient number, since it is larger than the sum of its proper divisors (1).

215901355679 is an equidigital number, since it uses as much as digits as its factorization.

215901355679 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2551500, while the sum is 53.

The spelling of 215901355679 in words is "two hundred fifteen billion, nine hundred one million, three hundred fifty-five thousand, six hundred seventy-nine".