157198523 has 2 divisors, whose sum is σ = 157198524. Its totient is φ = 157198522.

The previous prime is 157198513. The next prime is 157198543. The reversal of 157198523 is 325891751.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 157198523 - 2¹⁴ = 157182139 is a prime.

It is a super-2 number, since 2×157198523² = 49422751266763058, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (157198513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78599261 + 78599262.

It is an arithmetic number, because the mean of its divisors is an integer number (78599262).

Almost surely, 2^157198523 is an apocalyptic number.

157198523 is a deficient number, since it is larger than the sum of its proper divisors (1).

157198523 is an equidigital number, since it uses as much as digits as its factorization.

157198523 is an evil number, because the sum of its binary digits is even.

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

The square root of 157198523 is about 12537.8835135760. The cubic root of 157198523 is about 539.6963576430.

It can be divided in two parts, 15719 and 8523, that added together give a palindrome (24242).

The spelling of 157198523 in words is "one hundred fifty-seven million, one hundred ninety-eight thousand, five hundred twenty-three".