216632650 has 72 divisors (see below), whose sum is σ = 450935424. Its totient is φ = 77313600.

The previous prime is 216632627. The next prime is 216632651. The reversal of 216632650 is 56236612.

216632650 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (216632651) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 261537 + ... + 262363.

It is an arithmetic number, because the mean of its divisors is an integer number (6262992).

Almost surely, 2^216632650 is an apocalyptic number.

216632650 is an abundant number, since it is smaller than the sum of its proper divisors (234302774).

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

216632650 is a wasteful number, since it uses less digits than its factorization.

216632650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896 (or 878 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 216632650 is about 14718.4459098099. The cubic root of 216632650 is about 600.5852160551.

The spelling of 216632650 in words is "two hundred sixteen million, six hundred thirty-two thousand, six hundred fifty".