23131457 has 2 divisors, whose sum is σ = 23131458. Its totient is φ = 23131456.

The previous prime is 23131453. The next prime is 23131469. The reversal of 23131457 is 75413132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18800896 + 4330561 = 4336^2 + 2081^2 .

It is a cyclic number.

It is not a de Polignac number, because 23131457 - 2² = 23131453 is a prime.

It is not a weakly prime, because it can be changed into another prime (23131453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11565728 + 11565729.

It is an arithmetic number, because the mean of its divisors is an integer number (11565729).

Almost surely, 2^23131457 is an apocalyptic number.

It is an amenable number.

23131457 is a deficient number, since it is larger than the sum of its proper divisors (1).

23131457 is an equidigital number, since it uses as much as digits as its factorization.

23131457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2520, while the sum is 26.

The square root of 23131457 is about 4809.5173354506. The cubic root of 23131457 is about 284.9274751337.

Adding to 23131457 its reverse (75413132), we get a palindrome (98544589).

The spelling of 23131457 in words is "twenty-three million, one hundred thirty-one thousand, four hundred fifty-seven".