157231943 has 4 divisors (see below), whose sum is σ = 171525768. Its totient is φ = 142938120.

The previous prime is 157231931. The next prime is 157231957. The reversal of 157231943 is 349132751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 349132751 = 11 ⋅31739341.

It is a cyclic number.

It is not a de Polignac number, because 157231943 - 2¹⁴ = 157215559 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 (157231903) 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, 7146896 + ... + 7146917.

It is an arithmetic number, because the mean of its divisors is an integer number (42881442).

Almost surely, 2^157231943 is an apocalyptic number.

157231943 is a deficient number, since it is larger than the sum of its proper divisors (14293825).

157231943 is a wasteful number, since it uses less digits than its factorization.

157231943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14293824.

The product of its digits is 22680, while the sum is 35.

The square root of 157231943 is about 12539.2162035751. The cubic root of 157231943 is about 539.7346009503.

The spelling of 157231943 in words is "one hundred fifty-seven million, two hundred thirty-one thousand, nine hundred forty-three".