40956181 has 4 divisors (see below), whose sum is σ = 46807072. Its totient is φ = 35105292.

The previous prime is 40956173. The next prime is 40956187. The reversal of 40956181 is 18165904.

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 40956181 - 2³ = 40956173 is a prime.

It is a super-2 number, since 2×40956181² = 3354817524209522, 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 (40956187) 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, 2925435 + ... + 2925448.

It is an arithmetic number, because the mean of its divisors is an integer number (11701768).

Almost surely, 2^40956181 is an apocalyptic number.

It is an amenable number.

40956181 is a deficient number, since it is larger than the sum of its proper divisors (5850891).

40956181 is an equidigital number, since it uses as much as digits as its factorization.

40956181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5850890.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 40956181 is about 6399.7016336701. The cubic root of 40956181 is about 344.6988368090.

The spelling of 40956181 in words is "forty million, nine hundred fifty-six thousand, one hundred eighty-one".