431157261 has 16 divisors (see below), whose sum is σ = 584337600. Its totient is φ = 282720768.

The previous prime is 431157229. The next prime is 431157299. The reversal of 431157261 is 162751134.

It is not a de Polignac number, because 431157261 - 2⁵ = 431157229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431157061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 185575 + ... + 187883.

It is an arithmetic number, because the mean of its divisors is an integer number (36521100).

Almost surely, 2^431157261 is an apocalyptic number.

It is an amenable number.

431157261 is a deficient number, since it is larger than the sum of its proper divisors (153180339).

431157261 is a wasteful number, since it uses less digits than its factorization.

431157261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3308.

The product of its digits is 5040, while the sum is 30.

The square root of 431157261 is about 20764.3266445122. The cubic root of 431157261 is about 755.4607429959.

The spelling of 431157261 in words is "four hundred thirty-one million, one hundred fifty-seven thousand, two hundred sixty-one".