157840218 has 16 divisors (see below), whose sum is σ = 350756160. Its totient is φ = 52613388.

The previous prime is 157840213. The next prime is 157840247. The reversal of 157840218 is 812048751.

157840218 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 (157840211) 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, 1461430 + ... + 1461537.

It is an arithmetic number, because the mean of its divisors is an integer number (21922260).

Almost surely, 2^157840218 is an apocalyptic number.

157840218 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

157840218 is an abundant number, since it is smaller than the sum of its proper divisors (192915942).

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

157840218 is a wasteful number, since it uses less digits than its factorization.

157840218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2922978 (or 2922972 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

The square root of 157840218 is about 12563.4476955969. The cubic root of 157840218 is about 540.4297196766.

Adding to 157840218 its reverse (812048751), we get a palindrome (969888969).

The spelling of 157840218 in words is "one hundred fifty-seven million, eight hundred forty thousand, two hundred eighteen".