40100115 has 16 divisors (see below), whose sum is σ = 69993216. Its totient is φ = 19442400.

The previous prime is 40100113. The next prime is 40100129. The reversal of 40100115 is 51100104.

It is a happy number.

It is not a de Polignac number, because 40100115 - 2¹ = 40100113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40100115.

It is not an unprimeable number, because it can be changed into a prime (40100113) 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, 121351 + ... + 121680.

It is an arithmetic number, because the mean of its divisors is an integer number (4374576).

Almost surely, 2^40100115 is an apocalyptic number.

40100115 is a deficient number, since it is larger than the sum of its proper divisors (29893101).

40100115 is a wasteful number, since it uses less digits than its factorization.

40100115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243050.

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 40100115 is about 6332.4651597936. The cubic root of 40100115 is about 342.2802753591.

Adding to 40100115 its reverse (51100104), we get a palindrome (91200219).

The spelling of 40100115 in words is "forty million, one hundred thousand, one hundred fifteen".