23212961 has 2 divisors, whose sum is σ = 23212962. Its totient is φ = 23212960.

The previous prime is 23212919. The next prime is 23212979. The reversal of 23212961 is 16921232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17181025 + 6031936 = 4145^2 + 2456^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23212961 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 23212961.

It is not a weakly prime, because it can be changed into another prime (23211961) 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, 11606480 + 11606481.

It is an arithmetic number, because the mean of its divisors is an integer number (11606481).

Almost surely, 2^23212961 is an apocalyptic number.

It is an amenable number.

23212961 is a deficient number, since it is larger than the sum of its proper divisors (1).

23212961 is an equidigital number, since it uses as much as digits as its factorization.

23212961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 26.

The square root of 23212961 is about 4817.9830842376. The cubic root of 23212961 is about 285.2617314526.

The spelling of 23212961 in words is "twenty-three million, two hundred twelve thousand, nine hundred sixty-one".