216553432 has 32 divisors (see below), whose sum is σ = 410335200. Its totient is φ = 107138304.

The previous prime is 216553427. The next prime is 216553433. The reversal of 216553432 is 234355612.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 216553394 and 216553403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216553433) 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, 493069 + ... + 493507.

It is an arithmetic number, because the mean of its divisors is an integer number (12822975).

Almost surely, 2^216553432 is an apocalyptic number.

It is an amenable number.

216553432 is a deficient number, since it is larger than the sum of its proper divisors (193781768).

216553432 is a wasteful number, since it uses less digits than its factorization.

216553432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 955 (or 951 counting only the distinct ones).

The product of its digits is 21600, while the sum is 31.

The square root of 216553432 is about 14715.7545508207. The cubic root of 216553432 is about 600.5120000061.

The spelling of 216553432 in words is "two hundred sixteen million, five hundred fifty-three thousand, four hundred thirty-two".