157238519 has 4 divisors (see below), whose sum is σ = 159228960. Its totient is φ = 155248080.

The previous prime is 157238467. The next prime is 157238527. The reversal of 157238519 is 915832751.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157238519 is a prime.

It is a super-2 number, since 2×157238519² = 49447903714626722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157238579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 995102 + ... + 995259.

It is an arithmetic number, because the mean of its divisors is an integer number (39807240).

Almost surely, 2^157238519 is an apocalyptic number.

157238519 is a deficient number, since it is larger than the sum of its proper divisors (1990441).

157238519 is an equidigital number, since it uses as much as digits as its factorization.

157238519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1990440.

The product of its digits is 75600, while the sum is 41.

The square root of 157238519 is about 12539.4784181799. The cubic root of 157238519 is about 539.7421253867.

It can be divided in two parts, 15723 and 8519, that added together give a palindrome (24242).

The spelling of 157238519 in words is "one hundred fifty-seven million, two hundred thirty-eight thousand, five hundred nineteen".