23123251 has 2 divisors, whose sum is σ = 23123252. Its totient is φ = 23123250.

The previous prime is 23123239. The next prime is 23123273. The reversal of 23123251 is 15232132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23123251 - 2²¹ = 21026099 is a prime.

It is not a weakly prime, because it can be changed into another prime (23123231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11561625 + 11561626.

It is an arithmetic number, because the mean of its divisors is an integer number (11561626).

Almost surely, 2^23123251 is an apocalyptic number.

23123251 is the 2151-st centered decagonal number.

23123251 is a deficient number, since it is larger than the sum of its proper divisors (1).

23123251 is an equidigital number, since it uses as much as digits as its factorization.

23123251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 360, while the sum is 19.

The square root of 23123251 is about 4808.6641596186. The cubic root of 23123251 is about 284.8937779999.

Adding to 23123251 its reverse (15232132), we get a palindrome (38355383).

The spelling of 23123251 in words is "twenty-three million, one hundred twenty-three thousand, two hundred fifty-one".