4431313261 has 2 divisors, whose sum is σ = 4431313262. Its totient is φ = 4431313260.

The previous prime is 4431313253. The next prime is 4431313283. The reversal of 4431313261 is 1623131344.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2519437636 + 1911875625 = 50194^2 + 43725^2 .

It is a cyclic number.

It is not a de Polignac number, because 4431313261 - 2³ = 4431313253 is a prime.

It is a super-2 number, since 2×4431313261² = 39273074434228908242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4431313231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2215656630 + 2215656631.

It is an arithmetic number, because the mean of its divisors is an integer number (2215656631).

Almost surely, 2^4431313261 is an apocalyptic number.

It is an amenable number.

4431313261 is a deficient number, since it is larger than the sum of its proper divisors (1).

4431313261 is an equidigital number, since it uses as much as digits as its factorization.

4431313261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 28.

The square root of 4431313261 is about 66568.1099401207. The cubic root of 4431313261 is about 1642.5205714414.

The spelling of 4431313261 in words is "four billion, four hundred thirty-one million, three hundred thirteen thousand, two hundred sixty-one".