40900181 has 16 divisors (see below), whose sum is σ = 50649984. Its totient is φ = 32223744.

The previous prime is 40900177. The next prime is 40900201. The reversal of 40900181 is 18100904.

It is not a de Polignac number, because 40900181 - 2² = 40900177 is a prime.

It is a super-2 number, since 2×40900181² = 3345649611665522, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40900081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1121 + ... + 9113.

It is an arithmetic number, because the mean of its divisors is an integer number (3165624).

Almost surely, 2^40900181 is an apocalyptic number.

It is an amenable number.

40900181 is a deficient number, since it is larger than the sum of its proper divisors (9749803).

40900181 is a wasteful number, since it uses less digits than its factorization.

40900181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8060.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 40900181 is about 6395.3249331054. The cubic root of 40900181 is about 344.5416611894.

The spelling of 40900181 in words is "forty million, nine hundred thousand, one hundred eighty-one".