40016191 has 8 divisors (see below), whose sum is σ = 40695264. Its totient is φ = 39340800.

The previous prime is 40016173. The next prime is 40016213. The reversal of 40016191 is 19161004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40016191 - 2¹⁵ = 39983423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40016161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28590 + ... + 29956.

It is an arithmetic number, because the mean of its divisors is an integer number (5086908).

Almost surely, 2^40016191 is an apocalyptic number.

40016191 is a deficient number, since it is larger than the sum of its proper divisors (679073).

40016191 is a wasteful number, since it uses less digits than its factorization.

40016191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1841.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 40016191 is about 6325.8352017738. The cubic root of 40016191 is about 342.0413268117.

Adding to 40016191 its reverse (19161004), we get a palindrome (59177195).

The spelling of 40016191 in words is "forty million, sixteen thousand, one hundred ninety-one".