231623761 has 2 divisors, whose sum is σ = 231623762. Its totient is φ = 231623760.

The previous prime is 231623753. The next prime is 231623767. The reversal of 231623761 is 167326132.

231623761 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., 220700736 + 10923025 = 14856^2 + 3305^2 .

It is a cyclic number.

It is not a de Polignac number, because 231623761 - 2³ = 231623753 is a prime.

It is not a weakly prime, because it can be changed into another prime (231623767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115811880 + 115811881.

It is an arithmetic number, because the mean of its divisors is an integer number (115811881).

Almost surely, 2^231623761 is an apocalyptic number.

It is an amenable number.

231623761 is a deficient number, since it is larger than the sum of its proper divisors (1).

231623761 is an equidigital number, since it uses as much as digits as its factorization.

231623761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 31.

The square root of 231623761 is about 15219.1905500917. The cubic root of 231623761 is about 614.1310229429.

Adding to 231623761 its reverse (167326132), we get a palindrome (398949893).

The spelling of 231623761 in words is "two hundred thirty-one million, six hundred twenty-three thousand, seven hundred sixty-one".