45305681 has 2 divisors, whose sum is σ = 45305682. Its totient is φ = 45305680.

The previous prime is 45305677. The next prime is 45305719. The reversal of 45305681 is 18650354.

45305681 = 4759² + 4760².

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22657600 + 22648081 = 4760^2 + 4759^2 .

It is a cyclic number.

It is not a de Polignac number, because 45305681 - 2² = 45305677 is a prime.

It is a super-2 number, since 2×45305681² = 4105209461747522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (45305621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22652840 + 22652841.

It is an arithmetic number, because the mean of its divisors is an integer number (22652841).

Almost surely, 2^45305681 is an apocalyptic number.

45305681 is the 4760-th centered square number.

It is an amenable number.

45305681 is a deficient number, since it is larger than the sum of its proper divisors (1).

45305681 is an equidigital number, since it uses as much as digits as its factorization.

45305681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 45305681 is about 6730.9494872566. The cubic root of 45305681 is about 356.4929023239.

The spelling of 45305681 in words is "forty-five million, three hundred five thousand, six hundred eighty-one".