40959181 has 4 divisors (see below), whose sum is σ = 40989312. Its totient is φ = 40929052.

The previous prime is 40959167. The next prime is 40959197. The reversal of 40959181 is 18195904.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40959181 - 2⁷ = 40959053 is a prime.

It is a super-2 number, since 2×40959181² = 3355309016381522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40959181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40959131) 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, 12925 + ... + 15778.

It is an arithmetic number, because the mean of its divisors is an integer number (10247328).

Almost surely, 2^40959181 is an apocalyptic number.

It is an amenable number.

40959181 is a deficient number, since it is larger than the sum of its proper divisors (30131).

40959181 is a wasteful number, since it uses less digits than its factorization.

40959181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30130.

The product of its (nonzero) digits is 12960, while the sum is 37.

The square root of 40959181 is about 6399.9360153052. The cubic root of 40959181 is about 344.7072528872.

The spelling of 40959181 in words is "forty million, nine hundred fifty-nine thousand, one hundred eighty-one".