231254304331 has 4 divisors (see below), whose sum is σ = 231282972000. Its totient is φ = 231225636664.

The previous prime is 231254304329. The next prime is 231254304349. The reversal of 231254304331 is 133403452132.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 231254304331 - 2¹ = 231254304329 is a prime.

It is a super-2 number, since 2×231254304331² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231254304293 and 231254304302.

It is not an unprimeable number, because it can be changed into a prime (231254304131) 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, 14321731 + ... + 14337868.

It is an arithmetic number, because the mean of its divisors is an integer number (57820743000).

Almost surely, 2^231254304331 is an apocalyptic number.

231254304331 is a deficient number, since it is larger than the sum of its proper divisors (28667669).

231254304331 is an equidigital number, since it uses as much as digits as its factorization.

231254304331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28667668.

The product of its (nonzero) digits is 25920, while the sum is 31.

Adding to 231254304331 its reverse (133403452132), we get a palindrome (364657756463).

The spelling of 231254304331 in words is "two hundred thirty-one billion, two hundred fifty-four million, three hundred four thousand, three hundred thirty-one".