2345805881 has 2 divisors, whose sum is σ = 2345805882. Its totient is φ = 2345805880.

The previous prime is 2345805859. The next prime is 2345805893. The reversal of 2345805881 is 1885085432.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2250079225 + 95726656 = 47435^2 + 9784^2 .

It is a cyclic number.

It is not a de Polignac number, because 2345805881 - 2⁶ = 2345805817 is a prime.

It is a super-2 number, since 2×2345805881² = 11005610462668372322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2345805821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1172902940 + 1172902941.

It is an arithmetic number, because the mean of its divisors is an integer number (1172902941).

Almost surely, 2^2345805881 is an apocalyptic number.

It is an amenable number.

2345805881 is a deficient number, since it is larger than the sum of its proper divisors (1).

2345805881 is an equidigital number, since it uses as much as digits as its factorization.

2345805881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 307200, while the sum is 44.

The square root of 2345805881 is about 48433.5202210205. The cubic root of 2345805881 is about 1328.7114890044.

The spelling of 2345805881 in words is "two billion, three hundred forty-five million, eight hundred five thousand, eight hundred eighty-one".