45570781 has 2 divisors, whose sum is σ = 45570782. Its totient is φ = 45570780.

The previous prime is 45570739. The next prime is 45570821. The reversal of 45570781 is 18707554.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45562500 + 8281 = 6750^2 + 91^2 .

It is a cyclic number.

It is not a de Polignac number, because 45570781 - 2⁹ = 45570269 is a prime.

It is a super-2 number, since 2×45570781² = 4153392161899922, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 45570781.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45550781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22785390 + 22785391.

It is an arithmetic number, because the mean of its divisors is an integer number (22785391).

Almost surely, 2^45570781 is an apocalyptic number.

It is an amenable number.

45570781 is a deficient number, since it is larger than the sum of its proper divisors (1).

45570781 is an equidigital number, since it uses as much as digits as its factorization.

45570781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39200, while the sum is 37.

The square root of 45570781 is about 6750.6133795382. The cubic root of 45570781 is about 357.1868736835.

The spelling of 45570781 in words is "forty-five million, five hundred seventy thousand, seven hundred eighty-one".