45518181 has 8 divisors (see below), whose sum is σ = 60952320. Its totient is φ = 30214752.

The previous prime is 45518153. The next prime is 45518189. The reversal of 45518181 is 18181554.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 45518181 - 2⁹ = 45517669 is a prime.

It is a super-2 number, since 2×45518181² = 4143809603097522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45518189) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31861 + ... + 33258.

It is an arithmetic number, because the mean of its divisors is an integer number (7619040).

Almost surely, 2^45518181 is an apocalyptic number.

It is an amenable number.

45518181 is a deficient number, since it is larger than the sum of its proper divisors (15434139).

45518181 is a wasteful number, since it uses less digits than its factorization.

45518181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65355.

The product of its digits is 6400, while the sum is 33.

The square root of 45518181 is about 6746.7163123997. The cubic root of 45518181 is about 357.0493933180.

The spelling of 45518181 in words is "forty-five million, five hundred eighteen thousand, one hundred eighty-one".