216411972 has 48 divisors (see below), whose sum is σ = 611049600. Its totient is φ = 58194432.

The previous prime is 216411971. The next prime is 216411983. The reversal of 216411972 is 279114612.

It is a happy number.

216411972 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (216411971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74347 + ... + 77202.

It is an arithmetic number, because the mean of its divisors is an integer number (12730200).

Almost surely, 2^216411972 is an apocalyptic number.

It is an amenable number.

216411972 is an abundant number, since it is smaller than the sum of its proper divisors (394637628).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216411972 is a wasteful number, since it uses less digits than its factorization.

216411972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151580 (or 151578 counting only the distinct ones).

The product of its digits is 6048, while the sum is 33.

The square root of 216411972 is about 14710.9473522272. The cubic root of 216411972 is about 600.3812132983.

The spelling of 216411972 in words is "two hundred sixteen million, four hundred eleven thousand, nine hundred seventy-two".