42216953 has 4 divisors (see below), whose sum is σ = 43672740. Its totient is φ = 40761168.

The previous prime is 42216949. The next prime is 42216973. The reversal of 42216953 is 35961224.

It is a happy number.

42216953 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 7795264 + 34421689 = 2792^2 + 5867^2 .

It is a cyclic number.

It is not a de Polignac number, because 42216953 - 2² = 42216949 is a prime.

It is a super-2 number, since 2×42216953² = 3564542241208418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42216973) 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 3 ways as a sum of consecutive naturals, for example, 727850 + ... + 727907.

It is an arithmetic number, because the mean of its divisors is an integer number (10918185).

Almost surely, 2^42216953 is an apocalyptic number.

It is an amenable number.

42216953 is a deficient number, since it is larger than the sum of its proper divisors (1455787).

42216953 is a wasteful number, since it uses less digits than its factorization.

42216953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1455786.

The product of its digits is 12960, while the sum is 32.

The square root of 42216953 is about 6497.4574257936. The cubic root of 42216953 is about 348.2001562478.

The spelling of 42216953 in words is "forty-two million, two hundred sixteen thousand, nine hundred fifty-three".