2231201309 has 2 divisors, whose sum is σ = 2231201310. Its totient is φ = 2231201308.

The previous prime is 2231201281. The next prime is 2231201321. The reversal of 2231201309 is 9031021322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1489728409 + 741472900 = 38597^2 + 27230^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2231201309 is a prime.

It is a super-3 number, since 3×2231201309³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2231201339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1115600654 + 1115600655.

It is an arithmetic number, because the mean of its divisors is an integer number (1115600655).

Almost surely, 2^2231201309 is an apocalyptic number.

It is an amenable number.

2231201309 is a deficient number, since it is larger than the sum of its proper divisors (1).

2231201309 is an equidigital number, since it uses as much as digits as its factorization.

2231201309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 2231201309 is about 47235.5936662174. The cubic root of 2231201309 is about 1306.7111152608.

The spelling of 2231201309 in words is "two billion, two hundred thirty-one million, two hundred one thousand, three hundred nine".