216941651 has 4 divisors (see below), whose sum is σ = 216986952. Its totient is φ = 216896352.

The previous prime is 216941629. The next prime is 216941653. The reversal of 216941651 is 156149612.

216941651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 216941651 - 2²² = 212747347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216941653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14486 + ... + 25371.

It is an arithmetic number, because the mean of its divisors is an integer number (54246738).

Almost surely, 2^216941651 is an apocalyptic number.

216941651 is a deficient number, since it is larger than the sum of its proper divisors (45301).

216941651 is an equidigital number, since it uses as much as digits as its factorization.

216941651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45300.

The product of its digits is 12960, while the sum is 35.

The square root of 216941651 is about 14728.9392353964. The cubic root of 216941651 is about 600.8706351205.

The spelling of 216941651 in words is "two hundred sixteen million, nine hundred forty-one thousand, six hundred fifty-one".