2312222261 has 2 divisors, whose sum is σ = 2312222262. Its totient is φ = 2312222260.

The previous prime is 2312222257. The next prime is 2312222369. The reversal of 2312222261 is 1622222132.

2312222261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2125763236 + 186459025 = 46106^2 + 13655^2 .

It is a cyclic number.

It is not a de Polignac number, because 2312222261 - 2² = 2312222257 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2312122261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1156111130 + 1156111131.

It is an arithmetic number, because the mean of its divisors is an integer number (1156111131).

Almost surely, 2^2312222261 is an apocalyptic number.

It is an amenable number.

2312222261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2312222261 is an equidigital number, since it uses as much as digits as its factorization.

2312222261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 23.

The square root of 2312222261 is about 48085.5722748518. The cubic root of 2312222261 is about 1322.3401747722.

Adding to 2312222261 its reverse (1622222132), we get a palindrome (3934444393).

The spelling of 2312222261 in words is "two billion, three hundred twelve million, two hundred twenty-two thousand, two hundred sixty-one".