216155645 has 8 divisors (see below), whose sum is σ = 263783520. Its totient is φ = 169993360.

The previous prime is 216155627. The next prime is 216155657. The reversal of 216155645 is 546551612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 216155645 - 2⁸ = 216155389 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 366071 + ... + 366660.

It is an arithmetic number, because the mean of its divisors is an integer number (32972940).

Almost surely, 2^216155645 is an apocalyptic number.

It is an amenable number.

216155645 is a deficient number, since it is larger than the sum of its proper divisors (47627875).

216155645 is an equidigital number, since it uses as much as digits as its factorization.

216155645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732795.

The product of its digits is 36000, while the sum is 35.

The square root of 216155645 is about 14702.2326535802. The cubic root of 216155645 is about 600.1440811390.

The spelling of 216155645 in words is "two hundred sixteen million, one hundred fifty-five thousand, six hundred forty-five".