215216314605 has 64 divisors (see below), whose sum is σ = 398364503040. Its totient is φ = 110146521600.

The previous prime is 215216314601. The next prime is 215216314609. The reversal of 215216314605 is 506413612512.

215216314605 is a `hidden beast` number, since 2 + 1 + 5 + 2 + 16 + 31 + 4 + 605 = 666.

It is an interprime number because it is at equal distance from previous prime (215216314601) and next prime (215216314609).

It is not a de Polignac number, because 215216314605 - 2² = 215216314601 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 215216314605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215216314601) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 18924 + ... + 656346.

It is an arithmetic number, because the mean of its divisors is an integer number (6224445360).

Almost surely, 2^215216314605 is an apocalyptic number.

It is an amenable number.

215216314605 is a deficient number, since it is larger than the sum of its proper divisors (183148188435).

215216314605 is a wasteful number, since it uses less digits than its factorization.

215216314605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637539 (or 637533 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 215216314605 in words is "two hundred fifteen billion, two hundred sixteen million, three hundred fourteen thousand, six hundred five".