231353431 has 4 divisors (see below), whose sum is σ = 231385192. Its totient is φ = 231321672.

The previous prime is 231353417. The next prime is 231353449. The reversal of 231353431 is 134353132.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 231353431 - 2⁵ = 231353399 is a prime.

It is a super-2 number, since 2×231353431² = 107048820070943522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231353396 and 231353405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231353461) 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, 1096 + ... + 21538.

It is an arithmetic number, because the mean of its divisors is an integer number (57846298).

Almost surely, 2^231353431 is an apocalyptic number.

231353431 is a deficient number, since it is larger than the sum of its proper divisors (31761).

231353431 is a wasteful number, since it uses less digits than its factorization.

231353431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31760.

The product of its digits is 3240, while the sum is 25.

The square root of 231353431 is about 15210.3067358946. The cubic root of 231353431 is about 613.8920108087.

The spelling of 231353431 in words is "two hundred thirty-one million, three hundred fifty-three thousand, four hundred thirty-one".