216162644 has 24 divisors (see below), whose sum is σ = 385728000. Its totient is φ = 105973920.

The previous prime is 216162643. The next prime is 216162647. The reversal of 216162644 is 446261612.

216162644 = 1615² + 1616² + ... + 1693².

216162644 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×216162644² = 93452577322141472, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 216162644.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216162643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44789 + ... + 49379.

It is an arithmetic number, because the mean of its divisors is an integer number (16072000).

Almost surely, 2^216162644 is an apocalyptic number.

It is an amenable number.

216162644 is a deficient number, since it is larger than the sum of its proper divisors (169565356).

216162644 is a wasteful number, since it uses less digits than its factorization.

216162644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4823 (or 4821 counting only the distinct ones).

The product of its digits is 13824, while the sum is 32.

The square root of 216162644 is about 14702.4706767264. The cubic root of 216162644 is about 600.1505585134.

The spelling of 216162644 in words is "two hundred sixteen million, one hundred sixty-two thousand, six hundred forty-four".