40161217 has 8 divisors (see below), whose sum is σ = 40688424. Its totient is φ = 39637248.

The previous prime is 40161211. The next prime is 40161229. The reversal of 40161217 is 71216104.

40161217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 104976 + 40056241 = 324^2 + 6329^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40161217 is a prime.

It is a super-2 number, since 2×40161217² = 3225846701842178, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40161211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32503 + ... + 33715.

It is an arithmetic number, because the mean of its divisors is an integer number (5086053).

Almost surely, 2^40161217 is an apocalyptic number.

It is an amenable number.

40161217 is a deficient number, since it is larger than the sum of its proper divisors (527207).

40161217 is a wasteful number, since it uses less digits than its factorization.

40161217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1619.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 40161217 is about 6337.2878268231. The cubic root of 40161217 is about 342.4540354251.

The spelling of 40161217 in words is "forty million, one hundred sixty-one thousand, two hundred seventeen".