218183157 has 12 divisors (see below), whose sum is σ = 317422560. Its totient is φ = 144408168.

The previous prime is 218183123. The next prime is 218183171. The reversal of 218183157 is 751381812.

218183157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 218183157 - 2¹⁵ = 218150389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218183107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85953 + ... + 88454.

It is an arithmetic number, because the mean of its divisors is an integer number (26451880).

Almost surely, 2^218183157 is an apocalyptic number.

It is an amenable number.

218183157 is a deficient number, since it is larger than the sum of its proper divisors (99239403).

218183157 is a wasteful number, since it uses less digits than its factorization.

218183157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174552 (or 174549 counting only the distinct ones).

The product of its digits is 13440, while the sum is 36.

The square root of 218183157 is about 14771.0242366601. The cubic root of 218183157 is about 602.0146692746.

The spelling of 218183157 in words is "two hundred eighteen million, one hundred eighty-three thousand, one hundred fifty-seven".