40137217 has 4 divisors (see below), whose sum is σ = 40152276. Its totient is φ = 40122160.

The previous prime is 40137203. The next prime is 40137233. The reversal of 40137217 is 71273104.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22193521 + 17943696 = 4711^2 + 4236^2 .

It is a cyclic number.

It is not a de Polignac number, because 40137217 - 2⁷ = 40137089 is a prime.

It is a super-2 number, since 2×40137217² = 3221992377010178, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40137191 and 40137200.

It is not an unprimeable number, because it can be changed into a prime (40137257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2338 + ... + 9259.

It is an arithmetic number, because the mean of its divisors is an integer number (10038069).

Almost surely, 2^40137217 is an apocalyptic number.

It is an amenable number.

40137217 is a deficient number, since it is larger than the sum of its proper divisors (15059).

40137217 is a wasteful number, since it uses less digits than its factorization.

40137217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15058.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 40137217 is about 6335.3939893269. The cubic root of 40137217 is about 342.3858059640.

The spelling of 40137217 in words is "forty million, one hundred thirty-seven thousand, two hundred seventeen".