231457 has 4 divisors (see below), whose sum is σ = 235440. Its totient is φ = 227476.

The previous prime is 231443. The next prime is 231461. The reversal of 231457 is 754132.

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 231457 - 2¹¹ = 229409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (232457) 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, 1903 + ... + 2020.

It is an arithmetic number, because the mean of its divisors is an integer number (58860).

2²³¹⁴⁵⁷ is an apocalyptic number.

It is an amenable number.

231457 is a deficient number, since it is larger than the sum of its proper divisors (3983).

231457 is an equidigital number, since it uses as much as digits as its factorization.

231457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3982.

The product of its digits is 840, while the sum is 22.

The square root of 231457 is about 481.0997817501. The cubic root of 231457 is about 61.3983603279.

Adding to 231457 its reverse (754132), we get a palindrome (985589).

The spelling of 231457 in words is "two hundred thirty-one thousand, four hundred fifty-seven".