45541681 has 4 divisors (see below), whose sum is σ = 46401012. Its totient is φ = 44682352.

The previous prime is 45541669. The next prime is 45541703. The reversal of 45541681 is 18614554.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 34117281 + 11424400 = 5841^2 + 3380^2 .

It is a cyclic number.

It is not a de Polignac number, because 45541681 - 2¹¹ = 45539633 is a prime.

It is a super-2 number, since 2×45541681² = 4148089416611522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45541781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 429586 + ... + 429691.

It is an arithmetic number, because the mean of its divisors is an integer number (11600253).

Almost surely, 2^45541681 is an apocalyptic number.

It is an amenable number.

45541681 is a deficient number, since it is larger than the sum of its proper divisors (859331).

45541681 is an equidigital number, since it uses as much as digits as its factorization.

45541681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859330.

The product of its digits is 19200, while the sum is 34.

The square root of 45541681 is about 6748.4576756471. The cubic root of 45541681 is about 357.1108282363.

The spelling of 45541681 in words is "forty-five million, five hundred forty-one thousand, six hundred eighty-one".