231251623 has 2 divisors, whose sum is σ = 231251624. Its totient is φ = 231251622.

The previous prime is 231251611. The next prime is 231251651. The reversal of 231251623 is 326152132.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231251623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231251653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115625811 + 115625812.

It is an arithmetic number, because the mean of its divisors is an integer number (115625812).

Almost surely, 2^231251623 is an apocalyptic number.

231251623 is a deficient number, since it is larger than the sum of its proper divisors (1).

231251623 is an equidigital number, since it uses as much as digits as its factorization.

231251623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 25.

The square root of 231251623 is about 15206.9596895632. The cubic root of 231251623 is about 613.8019490541.

It can be divided in two parts, 2312 and 51623, that added together give a palindrome (53935).

The spelling of 231251623 in words is "two hundred thirty-one million, two hundred fifty-one thousand, six hundred twenty-three".