40140217 has 16 divisors (see below), whose sum is σ = 45828160. Its totient is φ = 34852032.

The previous prime is 40140203. The next prime is 40140229. The reversal of 40140217 is 71204104.

It is a cyclic number.

It is not a de Polignac number, because 40140217 - 2¹¹ = 40138169 is a prime.

It is a super-2 number, since 2×40140217² = 3222474041614178, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40140194 and 40140203.

It is not an unprimeable number, because it can be changed into a prime (40140017) 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, 39763 + ... + 40759.

It is an arithmetic number, because the mean of its divisors is an integer number (2864260).

Almost surely, 2^40140217 is an apocalyptic number.

It is an amenable number.

40140217 is a deficient number, since it is larger than the sum of its proper divisors (5687943).

40140217 is a wasteful number, since it uses less digits than its factorization.

40140217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 40140217 is about 6335.6307499727. The cubic root of 40140217 is about 342.3943361338.

The spelling of 40140217 in words is "forty million, one hundred forty thousand, two hundred seventeen".