40105599 has 16 divisors (see below), whose sum is σ = 58106880. Its totient is φ = 24511680.

The previous prime is 40105553. The next prime is 40105619. The reversal of 40105599 is 99550104.

It is not a de Polignac number, because 40105599 - 2⁸ = 40105343 is a prime.

It is a super-2 number, since 2×40105599² = 3216918142297602, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40104599) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9582 + ... + 13115.

It is an arithmetic number, because the mean of its divisors is an integer number (3631680).

Almost surely, 2^40105599 is an apocalyptic number.

40105599 is a deficient number, since it is larger than the sum of its proper divisors (18001281).

40105599 is a wasteful number, since it uses less digits than its factorization.

40105599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22750.

The product of its (nonzero) digits is 8100, while the sum is 33.

The square root of 40105599 is about 6332.8981517154. The cubic root of 40105599 is about 342.2958778037.

It can be divided in two parts, 40105 and 599, that added together give a palindrome (40704).

The spelling of 40105599 in words is "forty million, one hundred five thousand, five hundred ninety-nine".