45131161 has 2 divisors, whose sum is σ = 45131162. Its totient is φ = 45131160.

The previous prime is 45131159. The next prime is 45131173. The reversal of 45131161 is 16113154.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25603600 + 19527561 = 5060^2 + 4419^2 .

It is a cyclic number.

It is not a de Polignac number, because 45131161 - 2¹ = 45131159 is a prime.

Together with 45131159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (45131761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22565580 + 22565581.

It is an arithmetic number, because the mean of its divisors is an integer number (22565581).

Almost surely, 2^45131161 is an apocalyptic number.

It is an amenable number.

45131161 is a deficient number, since it is larger than the sum of its proper divisors (1).

45131161 is an equidigital number, since it uses as much as digits as its factorization.

45131161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 360, while the sum is 22.

The square root of 45131161 is about 6717.9729829763. The cubic root of 45131161 is about 356.0345698239.

The spelling of 45131161 in words is "forty-five million, one hundred thirty-one thousand, one hundred sixty-one".