216932944 has 10 divisors (see below), whose sum is σ = 420307610. Its totient is φ = 108466464.

The previous prime is 216932923. The next prime is 216932953. The reversal of 216932944 is 449239612.

It can be written as a sum of positive squares in only one way, i.e., 216442944 + 490000 = 14712^2 + 700^2 .

It is a junction number, because it is equal to n+sod(n) for n = 216932897 and 216932906.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6779139 + ... + 6779170.

It is an arithmetic number, because the mean of its divisors is an integer number (42030761).

Almost surely, 2^216932944 is an apocalyptic number.

It is an amenable number.

216932944 is a deficient number, since it is larger than the sum of its proper divisors (203374666).

216932944 is a wasteful number, since it uses less digits than its factorization.

216932944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13558317 (or 13558311 counting only the distinct ones).

The product of its digits is 93312, while the sum is 40.

The square root of 216932944 is about 14728.6436578525. The cubic root of 216932944 is about 600.8625963221.

The spelling of 216932944 in words is "two hundred sixteen million, nine hundred thirty-two thousand, nine hundred forty-four".