157431193 has 4 divisors (see below), whose sum is σ = 157870080. Its totient is φ = 156992308.

The previous prime is 157431161. The next prime is 157431223. The reversal of 157431193 is 391134751.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 157431193 - 2⁵ = 157431161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157431893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218905 + ... + 219622.

It is an arithmetic number, because the mean of its divisors is an integer number (39467520).

Almost surely, 2^157431193 is an apocalyptic number.

It is an amenable number.

157431193 is a deficient number, since it is larger than the sum of its proper divisors (438887).

157431193 is an equidigital number, since it uses as much as digits as its factorization.

157431193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438886.

The product of its digits is 11340, while the sum is 34.

The square root of 157431193 is about 12547.1587620465. The cubic root of 157431193 is about 539.9624951090.

The spelling of 157431193 in words is "one hundred fifty-seven million, four hundred thirty-one thousand, one hundred ninety-three".