40055111 has 6 divisors (see below), whose sum is σ = 42550200. Its totient is φ = 37698656.

The previous prime is 40055107. The next prime is 40055137. The reversal of 40055111 is 11155004.

It is not a de Polignac number, because 40055111 - 2² = 40055107 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

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 40055111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40055311) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 69011 + ... + 69588.

It is an arithmetic number, because the mean of its divisors is an integer number (7091700).

Almost surely, 2^40055111 is an apocalyptic number.

40055111 is a deficient number, since it is larger than the sum of its proper divisors (2495089).

40055111 is a wasteful number, since it uses less digits than its factorization.

40055111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138633 (or 138616 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 40055111 is about 6328.9107277635. The cubic root of 40055111 is about 342.1521813981.

The spelling of 40055111 in words is "forty million, fifty-five thousand, one hundred eleven".