45191181 has 12 divisors (see below), whose sum is σ = 70092672. Its totient is φ = 25823448.

The previous prime is 45191119. The next prime is 45191183. The reversal of 45191181 is 18119154.

It is a happy number.

It is not a de Polignac number, because 45191181 - 2⁷ = 45191053 is a prime.

It is a super-2 number, since 2×45191181² = 4084485680349522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45191183) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 153565 + ... + 153858.

It is an arithmetic number, because the mean of its divisors is an integer number (5841056).

Almost surely, 2^45191181 is an apocalyptic number.

It is an amenable number.

45191181 is a deficient number, since it is larger than the sum of its proper divisors (24901491).

45191181 is a wasteful number, since it uses less digits than its factorization.

45191181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307440 (or 307433 counting only the distinct ones).

The product of its digits is 1440, while the sum is 30.

The square root of 45191181 is about 6722.4386200247. The cubic root of 45191181 is about 356.1923302155.

The spelling of 45191181 in words is "forty-five million, one hundred ninety-one thousand, one hundred eighty-one".