23951281 has 2 divisors, whose sum is σ = 23951282. Its totient is φ = 23951280.

The previous prime is 23951237. The next prime is 23951287. The reversal of 23951281 is 18215932.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16200625 + 7750656 = 4025^2 + 2784^2 .

It is a cyclic number.

It is not a de Polignac number, because 23951281 - 2¹⁵ = 23918513 is a prime.

It is a super-2 number, since 2×23951281² = 1147327723081922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23951287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11975640 + 11975641.

It is an arithmetic number, because the mean of its divisors is an integer number (11975641).

Almost surely, 2^23951281 is an apocalyptic number.

It is an amenable number.

23951281 is a deficient number, since it is larger than the sum of its proper divisors (1).

23951281 is an equidigital number, since it uses as much as digits as its factorization.

23951281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 31.

The square root of 23951281 is about 4894.0045974641. The cubic root of 23951281 is about 288.2546014074.

The spelling of 23951281 in words is "twenty-three million, nine hundred fifty-one thousand, two hundred eighty-one".