216855076 has 27 divisors (see below), whose sum is σ = 392000049. Its totient is φ = 104966928.

The previous prime is 216855071. The next prime is 216855091. The reversal of 216855076 is 670558612.

The square root of 216855076 is 14726.

It is a perfect power (a square), and thus also a powerful number.

216855076 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 194044900 + 22810176 = 13930^2 + 4776^2 .

It is a super-2 number, since 2×216855076² = 94052247973931552, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216855071) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1089625 + ... + 1089823.

Almost surely, 2^216855076 is an apocalyptic number.

216855076 is the 14726-th square number.

It is an amenable number.

216855076 is a deficient number, since it is larger than the sum of its proper divisors (175144973).

216855076 is an equidigital number, since it uses as much as digits as its factorization.

216855076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476 (or 238 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 40.

The cubic root of 216855076 is about 600.7906945828.

The spelling of 216855076 in words is "two hundred sixteen million, eight hundred fifty-five thousand, seventy-six".