216189157 has 8 divisors (see below), whose sum is σ = 221263200. Its totient is φ = 211162224.

The previous prime is 216189139. The next prime is 216189199. The reversal of 216189157 is 751981612.

It is a happy number.

216189157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 216189157 - 2¹⁵ = 216156389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216189137) 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, 2407 + ... + 20932.

It is an arithmetic number, because the mean of its divisors is an integer number (27657900).

Almost surely, 2^216189157 is an apocalyptic number.

It is an amenable number.

216189157 is a deficient number, since it is larger than the sum of its proper divisors (5074043).

216189157 is a wasteful number, since it uses less digits than its factorization.

216189157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23555.

The product of its digits is 30240, while the sum is 40.

The square root of 216189157 is about 14703.3723002582. The cubic root of 216189157 is about 600.1750942687.

The spelling of 216189157 in words is "two hundred sixteen million, one hundred eighty-nine thousand, one hundred fifty-seven".