216713651 has 16 divisors (see below), whose sum is σ = 271289088. Its totient is φ = 168180000.

The previous prime is 216713647. The next prime is 216713681. The reversal of 216713651 is 156317612.

It is a cyclic number.

It is not a de Polignac number, because 216713651 - 2² = 216713647 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216713681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13721 + ... + 24933.

It is an arithmetic number, because the mean of its divisors is an integer number (16955568).

Almost surely, 2^216713651 is an apocalyptic number.

216713651 is a deficient number, since it is larger than the sum of its proper divisors (54575437).

216713651 is a wasteful number, since it uses less digits than its factorization.

216713651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11482.

The product of its digits is 7560, while the sum is 32.

The square root of 216713651 is about 14721.1973358148. The cubic root of 216713651 is about 600.6600615612.

The spelling of 216713651 in words is "two hundred sixteen million, seven hundred thirteen thousand, six hundred fifty-one".