216189629 has 24 divisors (see below), whose sum is σ = 241670400. Its totient is φ = 193098240.

The previous prime is 216189587. The next prime is 216189647. The reversal of 216189629 is 926981612.

It is not a de Polignac number, because 216189629 - 2²⁴ = 199412413 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 216189629.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216189689) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 528377 + ... + 528785.

It is an arithmetic number, because the mean of its divisors is an integer number (10069600).

Almost surely, 2^216189629 is an apocalyptic number.

It is an amenable number.

216189629 is a deficient number, since it is larger than the sum of its proper divisors (25480771).

216189629 is a wasteful number, since it uses less digits than its factorization.

216189629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533 (or 516 counting only the distinct ones).

The product of its digits is 93312, while the sum is 44.

The square root of 216189629 is about 14703.3883509890. The cubic root of 216189629 is about 600.1755310505.

The spelling of 216189629 in words is "two hundred sixteen million, one hundred eighty-nine thousand, six hundred twenty-nine".