231623057 has 2 divisors, whose sum is σ = 231623058. Its totient is φ = 231623056.

The previous prime is 231623047. The next prime is 231623059. The reversal of 231623057 is 750326132.

231623057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138674176 + 92948881 = 11776^2 + 9641^2 .

It is a cyclic number.

It is not a de Polignac number, because 231623057 - 2⁸ = 231622801 is a prime.

Together with 231623059, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (231623059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115811528 + 115811529.

It is an arithmetic number, because the mean of its divisors is an integer number (115811529).

Almost surely, 2^231623057 is an apocalyptic number.

It is an amenable number.

231623057 is a deficient number, since it is larger than the sum of its proper divisors (1).

231623057 is an equidigital number, since it uses as much as digits as its factorization.

231623057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 29.

The square root of 231623057 is about 15219.1674213802. The cubic root of 231623057 is about 614.1304007432.

Adding to 231623057 its reverse (750326132), we get a palindrome (981949189).

The spelling of 231623057 in words is "two hundred thirty-one million, six hundred twenty-three thousand, fifty-seven".