157517423 has 4 divisors (see below), whose sum is σ = 180019920. Its totient is φ = 135014928.

The previous prime is 157517419. The next prime is 157517497. The reversal of 157517423 is 324715751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 324715751 = 2767 ⋅117353.

It is a cyclic number.

It is not a de Polignac number, because 157517423 - 2² = 157517419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157517023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11251238 + ... + 11251251.

It is an arithmetic number, because the mean of its divisors is an integer number (45004980).

Almost surely, 2^157517423 is an apocalyptic number.

157517423 is a deficient number, since it is larger than the sum of its proper divisors (22502497).

157517423 is an equidigital number, since it uses as much as digits as its factorization.

157517423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22502496.

The product of its digits is 29400, while the sum is 35.

The square root of 157517423 is about 12550.5945277505. The cubic root of 157517423 is about 540.0610619107.

The spelling of 157517423 in words is "one hundred fifty-seven million, five hundred seventeen thousand, four hundred twenty-three".