2231020409 has 2 divisors, whose sum is σ = 2231020410. Its totient is φ = 2231020408.

The previous prime is 2231020403. The next prime is 2231020423. The reversal of 2231020409 is 9040201322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2202237184 + 28783225 = 46928^2 + 5365^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2231020409 is a prime.

It is a super-3 number, since 3×2231020409³ (a number of 29 digits) contains 333 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 (2231020403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1115510204 + 1115510205.

It is an arithmetic number, because the mean of its divisors is an integer number (1115510205).

Almost surely, 2^2231020409 is an apocalyptic number.

It is an amenable number.

2231020409 is a deficient number, since it is larger than the sum of its proper divisors (1).

2231020409 is an equidigital number, since it uses as much as digits as its factorization.

2231020409 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 23.

The square root of 2231020409 is about 47233.6787578524. The cubic root of 2231020409 is about 1306.6757993933.

The spelling of 2231020409 in words is "two billion, two hundred thirty-one million, twenty thousand, four hundred nine".