40055 has 4 divisors (see below), whose sum is σ = 48072. Its totient is φ = 32040.

The previous prime is 40039. The next prime is 40063. The reversal of 40055 is 55004.

40055 = 21² + 22² + ... + 50².

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

It is not a de Polignac number, because 40055 - 2⁴ = 40039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4001 + ... + 4010.

It is an arithmetic number, because the mean of its divisors is an integer number (12018).

2⁴⁰⁰⁵⁵ is an apocalyptic number.

40055 is a deficient number, since it is larger than the sum of its proper divisors (8017).

40055 is an equidigital number, since it uses as much as digits as its factorization.

40055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8016.

The product of its (nonzero) digits is 100, while the sum is 14.

The square root of 40055 is about 200.1374527668. The cubic root of 40055 is about 34.2151865343.

Adding to 40055 its reverse (55004), we get a palindrome (95059).

The spelling of 40055 in words is "forty thousand, fifty-five".