40240217 has 4 divisors (see below), whose sum is σ = 41176080. Its totient is φ = 39304356.

The previous prime is 40240181. The next prime is 40240223. The reversal of 40240217 is 71204204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40240217 - 2⁸ = 40239961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40240237) 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, 467867 + ... + 467952.

It is an arithmetic number, because the mean of its divisors is an integer number (10294020).

Almost surely, 2^40240217 is an apocalyptic number.

It is an amenable number.

40240217 is a deficient number, since it is larger than the sum of its proper divisors (935863).

40240217 is an equidigital number, since it uses as much as digits as its factorization.

40240217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935862.

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 40240217 is about 6343.5177149591. The cubic root of 40240217 is about 342.6784322538.

The spelling of 40240217 in words is "forty million, two hundred forty thousand, two hundred seventeen".