431530157 has 4 divisors (see below), whose sum is σ = 433941120. Its totient is φ = 429119196.

The previous prime is 431530123. The next prime is 431530219. The reversal of 431530157 is 751035134.

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, and also an emirpimes, since its reverse is a distinct semiprime: 751035134 = 2 ⋅375517567.

It is a cyclic number.

It is not a de Polignac number, because 431530157 - 2⁶ = 431530093 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 (431530457) 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, 1205213 + ... + 1205570.

It is an arithmetic number, because the mean of its divisors is an integer number (108485280).

Almost surely, 2^431530157 is an apocalyptic number.

It is an amenable number.

431530157 is a deficient number, since it is larger than the sum of its proper divisors (2410963).

431530157 is a wasteful number, since it uses less digits than its factorization.

431530157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2410962.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 431530157 is about 20773.3039500220. The cubic root of 431530157 is about 755.6784726116.

The spelling of 431530157 in words is "four hundred thirty-one million, five hundred thirty thousand, one hundred fifty-seven".