23130421157 has 2 divisors, whose sum is σ = 23130421158. Its totient is φ = 23130421156.

The previous prime is 23130421123. The next prime is 23130421207. The reversal of 23130421157 is 75112403132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22765076161 + 365344996 = 150881^2 + 19114^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23130421157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23130421057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11565210578 + 11565210579.

It is an arithmetic number, because the mean of its divisors is an integer number (11565210579).

Almost surely, 2^23130421157 is an apocalyptic number.

It is an amenable number.

23130421157 is a deficient number, since it is larger than the sum of its proper divisors (1).

23130421157 is an equidigital number, since it uses as much as digits as its factorization.

23130421157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 29.

Adding to 23130421157 its reverse (75112403132), we get a palindrome (98242824289).

The spelling of 23130421157 in words is "twenty-three billion, one hundred thirty million, four hundred twenty-one thousand, one hundred fifty-seven".