2331421691 has 2 divisors, whose sum is σ = 2331421692. Its totient is φ = 2331421690.

The previous prime is 2331421649. The next prime is 2331421711. The reversal of 2331421691 is 1961241332.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2331421691 - 2¹⁰ = 2331420667 is a prime.

It is not a weakly prime, because it can be changed into another prime (2331421091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1165710845 + 1165710846.

It is an arithmetic number, because the mean of its divisors is an integer number (1165710846).

Almost surely, 2^2331421691 is an apocalyptic number.

2331421691 is a deficient number, since it is larger than the sum of its proper divisors (1).

2331421691 is an equidigital number, since it uses as much as digits as its factorization.

2331421691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 32.

The square root of 2331421691 is about 48284.7977214361. The cubic root of 2331421691 is about 1325.9900877544.

The spelling of 2331421691 in words is "two billion, three hundred thirty-one million, four hundred twenty-one thousand, six hundred ninety-one".