45631985 has 12 divisors (see below), whose sum is σ = 63698868. Its totient is φ = 31290336.

The previous prime is 45631981. The next prime is 45631997. The reversal of 45631985 is 58913654.

45631985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 20511841 + 25120144 = 4529^2 + 5012^2 .

It is not a de Polignac number, because 45631985 - 2² = 45631981 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45631981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 92882 + ... + 93371.

It is an arithmetic number, because the mean of its divisors is an integer number (5308239).

Almost surely, 2^45631985 is an apocalyptic number.

It is an amenable number.

45631985 is a deficient number, since it is larger than the sum of its proper divisors (18066883).

45631985 is a wasteful number, since it uses less digits than its factorization.

45631985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186272 (or 186265 counting only the distinct ones).

The product of its digits is 129600, while the sum is 41.

The square root of 45631985 is about 6755.1450761623. The cubic root of 45631985 is about 357.3467091839.

The spelling of 45631985 in words is "forty-five million, six hundred thirty-one thousand, nine hundred eighty-five".