23332781 has 2 divisors, whose sum is σ = 23332782. Its totient is φ = 23332780.

The previous prime is 23332769. The next prime is 23332783. The reversal of 23332781 is 18723332.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18748900 + 4583881 = 4330^2 + 2141^2 .

It is a cyclic number.

It is not a de Polignac number, because 23332781 - 2¹⁸ = 23070637 is a prime.

It is a super-2 number, since 2×23332781² = 1088837338387922, which contains 22 as substring.

Together with 23332783, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23332783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11666390 + 11666391.

It is an arithmetic number, because the mean of its divisors is an integer number (11666391).

Almost surely, 2^23332781 is an apocalyptic number.

It is an amenable number.

23332781 is a deficient number, since it is larger than the sum of its proper divisors (1).

23332781 is an equidigital number, since it uses as much as digits as its factorization.

23332781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 29.

The square root of 23332781 is about 4830.4017431265. The cubic root of 23332781 is about 285.7517079911.

The spelling of 23332781 in words is "twenty-three million, three hundred thirty-two thousand, seven hundred eighty-one".