231145023 has 8 divisors (see below), whose sum is σ = 308263600. Its totient is φ = 154061568.

The previous prime is 231144983. The next prime is 231145069. The reversal of 231145023 is 320541132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 231145023 - 2¹² = 231140927 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 (231145093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21423 + ... + 30351.

It is an arithmetic number, because the mean of its divisors is an integer number (38532950).

Almost surely, 2^231145023 is an apocalyptic number.

231145023 is a deficient number, since it is larger than the sum of its proper divisors (77118577).

231145023 is an equidigital number, since it uses as much as digits as its factorization.

231145023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17561.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 231145023 is about 15203.4543114386. The cubic root of 231145023 is about 613.7076198505.

Adding to 231145023 its reverse (320541132), we get a palindrome (551686155).

The spelling of 231145023 in words is "two hundred thirty-one million, one hundred forty-five thousand, twenty-three".