40077181 has 4 divisors (see below), whose sum is σ = 40170172. Its totient is φ = 39984192.

The previous prime is 40077173. The next prime is 40077209. The reversal of 40077181 is 18177004.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4137156 + 35940025 = 2034^2 + 5995^2 .

It is a cyclic number.

It is not a de Polignac number, because 40077181 - 2³ = 40077173 is a prime.

It is a super-2 number, since 2×40077181² = 3212360873813522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40077151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45846 + ... + 46711.

It is an arithmetic number, because the mean of its divisors is an integer number (10042543).

Almost surely, 2^40077181 is an apocalyptic number.

It is an amenable number.

40077181 is a deficient number, since it is larger than the sum of its proper divisors (92991).

40077181 is an equidigital number, since it uses as much as digits as its factorization.

40077181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92990.

The product of its (nonzero) digits is 1568, while the sum is 28.

The square root of 40077181 is about 6330.6540736325. The cubic root of 40077181 is about 342.2150107682.

The spelling of 40077181 in words is "forty million, seventy-seven thousand, one hundred eighty-one".