23312020261 has 2 divisors, whose sum is σ = 23312020262. Its totient is φ = 23312020260.

The previous prime is 23312020229. The next prime is 23312020273. The reversal of 23312020261 is 16202021332.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21672256225 + 1639764036 = 147215^2 + 40494^2 .

It is a cyclic number.

It is not a de Polignac number, because 23312020261 - 2⁵ = 23312020229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23312020561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11656010130 + 11656010131.

It is an arithmetic number, because the mean of its divisors is an integer number (11656010131).

Almost surely, 2^23312020261 is an apocalyptic number.

It is an amenable number.

23312020261 is a deficient number, since it is larger than the sum of its proper divisors (1).

23312020261 is an equidigital number, since it uses as much as digits as its factorization.

23312020261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 23312020261 its reverse (16202021332), we get a palindrome (39514041593).

The spelling of 23312020261 in words is "twenty-three billion, three hundred twelve million, twenty thousand, two hundred sixty-one".