157218345 has 24 divisors (see below), whose sum is σ = 273751296. Its totient is φ = 83468448.

The previous prime is 157218319. The next prime is 157218349. The reversal of 157218345 is 543812751.

157218345 is a `hidden beast` number, since 1 + 572 + 1 + 83 + 4 + 5 = 666.

It is not a de Polignac number, because 157218345 - 2¹³ = 157210153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (157218349) 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, 2202 + ... + 17868.

It is an arithmetic number, because the mean of its divisors is an integer number (11406304).

Almost surely, 2^157218345 is an apocalyptic number.

157218345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

157218345 is a deficient number, since it is larger than the sum of its proper divisors (116532951).

157218345 is a wasteful number, since it uses less digits than its factorization.

157218345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15901 (or 15898 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 157218345 is about 12538.6739729526. The cubic root of 157218345 is about 539.7190410868.

The spelling of 157218345 in words is "one hundred fifty-seven million, two hundred eighteen thousand, three hundred forty-five".