4431135161 has 2 divisors, whose sum is σ = 4431135162. Its totient is φ = 4431135160.

The previous prime is 4431135157. The next prime is 4431135167. The reversal of 4431135161 is 1615311344.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4353360400 + 77774761 = 65980^2 + 8819^2 .

It is a cyclic number.

It is not a de Polignac number, because 4431135161 - 2² = 4431135157 is a prime.

It is not a weakly prime, because it can be changed into another prime (4431135167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2215567580 + 2215567581.

It is an arithmetic number, because the mean of its divisors is an integer number (2215567581).

Almost surely, 2^4431135161 is an apocalyptic number.

It is an amenable number.

4431135161 is a deficient number, since it is larger than the sum of its proper divisors (1).

4431135161 is an equidigital number, since it uses as much as digits as its factorization.

4431135161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 29.

The square root of 4431135161 is about 66566.7721990484. The cubic root of 4431135161 is about 1642.4985661640.

The spelling of 4431135161 in words is "four billion, four hundred thirty-one million, one hundred thirty-five thousand, one hundred sixty-one".