157218519 has 16 divisors (see below), whose sum is σ = 212677344. Its totient is φ = 103296000.

The previous prime is 157218493. The next prime is 157218527. The reversal of 157218519 is 915812751.

It is not a de Polignac number, because 157218519 - 2¹³ = 157210327 is a prime.

It is a super-2 number, since 2×157218519² = 49435325433106722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157218319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71947 + ... + 74099.

It is an arithmetic number, because the mean of its divisors is an integer number (13292334).

Almost surely, 2^157218519 is an apocalyptic number.

157218519 is a deficient number, since it is larger than the sum of its proper divisors (55458825).

157218519 is a wasteful number, since it uses less digits than its factorization.

157218519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2498.

The product of its digits is 25200, while the sum is 39.

The square root of 157218519 is about 12538.6809114835. The cubic root of 157218519 is about 539.7192401965.

The spelling of 157218519 in words is "one hundred fifty-seven million, two hundred eighteen thousand, five hundred nineteen".