216988952615 has 4 divisors (see below), whose sum is σ = 260386743144. Its totient is φ = 173591162088.

The previous prime is 216988952603. The next prime is 216988952627. The reversal of 216988952615 is 516259889612.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (216988952603) and next prime (216988952627).

It is a cyclic number.

It is not a de Polignac number, because 216988952615 - 2⁴ = 216988952599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21698895257 + ... + 21698895266.

It is an arithmetic number, because the mean of its divisors is an integer number (65096685786).

Almost surely, 2^216988952615 is an apocalyptic number.

216988952615 is a deficient number, since it is larger than the sum of its proper divisors (43397790529).

216988952615 is an equidigital number, since it uses as much as digits as its factorization.

216988952615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43397790528.

The product of its digits is 18662400, while the sum is 62.

The spelling of 216988952615 in words is "two hundred sixteen billion, nine hundred eighty-eight million, nine hundred fifty-two thousand, six hundred fifteen".