45185081 has 6 divisors (see below), whose sum is σ = 45459246. Its totient is φ = 44912000.

The previous prime is 45185069. The next prime is 45185111. The reversal of 45185081 is 18058154.

45185081 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 3 ways, for example, as 38241856 + 6943225 = 6184^2 + 2635^2 .

It is not a de Polignac number, because 45185081 - 2²² = 40990777 is a prime.

It is a super-2 number, since 2×45185081² = 4083383089953122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45185051) 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 5 ways as a sum of consecutive naturals, for example, 112481 + ... + 112881.

It is an arithmetic number, because the mean of its divisors is an integer number (7576541).

Almost surely, 2^45185081 is an apocalyptic number.

It is an amenable number.

45185081 is a deficient number, since it is larger than the sum of its proper divisors (274165).

45185081 is an frugal number, since it uses more digits than its factorization.

45185081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083 (or 682 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 32.

The square root of 45185081 is about 6721.9849003103. The cubic root of 45185081 is about 356.1763029662.

The spelling of 45185081 in words is "forty-five million, one hundred eighty-five thousand, eighty-one".