42953217 has 4 divisors (see below), whose sum is σ = 57270960. Its totient is φ = 28635476.

The previous prime is 42953201. The next prime is 42953219. The reversal of 42953217 is 71235924.

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 42953217 - 2⁴ = 42953201 is a prime.

It is a super-3 number, since 3×42953217³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (42953219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7158867 + ... + 7158872.

It is an arithmetic number, because the mean of its divisors is an integer number (14317740).

Almost surely, 2^42953217 is an apocalyptic number.

It is an amenable number.

42953217 is a deficient number, since it is larger than the sum of its proper divisors (14317743).

42953217 is a wasteful number, since it uses less digits than its factorization.

42953217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14317742.

The product of its digits is 15120, while the sum is 33.

The square root of 42953217 is about 6553.8703832163. The cubic root of 42953217 is about 350.2127060797.

The spelling of 42953217 in words is "forty-two million, nine hundred fifty-three thousand, two hundred seventeen".