216619432 has 8 divisors (see below), whose sum is σ = 406161450. Its totient is φ = 108309712.

The previous prime is 216619391. The next prime is 216619433. The reversal of 216619432 is 234916612.

It is a happy number.

216619432 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., 214505316 + 2114116 = 14646^2 + 1454^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (216619433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13538707 + ... + 13538722.

Almost surely, 2^216619432 is an apocalyptic number.

It is an amenable number.

216619432 is a deficient number, since it is larger than the sum of its proper divisors (189542018).

216619432 is a wasteful number, since it uses less digits than its factorization.

216619432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27077435 (or 27077431 counting only the distinct ones).

The product of its digits is 15552, while the sum is 34.

The square root of 216619432 is about 14717.9968745750. The cubic root of 216619432 is about 600.5730007575.

The spelling of 216619432 in words is "two hundred sixteen million, six hundred nineteen thousand, four hundred thirty-two".