45089281 has 2 divisors, whose sum is σ = 45089282. Its totient is φ = 45089280.

The previous prime is 45089279. The next prime is 45089293. The reversal of 45089281 is 18298054.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44823025 + 266256 = 6695^2 + 516^2 .

It is a cyclic number.

It is not a de Polignac number, because 45089281 - 2¹ = 45089279 is a prime.

It is a super-2 number, since 2×45089281² = 4066086522193922, which contains 22 as substring.

Together with 45089279, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 45089281.

It is not a weakly prime, because it can be changed into another prime (45089081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22544640 + 22544641.

It is an arithmetic number, because the mean of its divisors is an integer number (22544641).

Almost surely, 2^45089281 is an apocalyptic number.

It is an amenable number.

45089281 is a deficient number, since it is larger than the sum of its proper divisors (1).

45089281 is an equidigital number, since it uses as much as digits as its factorization.

45089281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 45089281 is about 6714.8552478814. The cubic root of 45089281 is about 355.9244068971.

The spelling of 45089281 in words is "forty-five million, eighty-nine thousand, two hundred eighty-one".