42221873 has 4 divisors (see below), whose sum is σ = 42251328. Its totient is φ = 42192420.

The previous prime is 42221831. The next prime is 42221899. The reversal of 42221873 is 37812224.

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 a de Polignac number, because none of the positive numbers 2^k-42221873 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42221273) 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, 12461 + ... + 15482.

It is an arithmetic number, because the mean of its divisors is an integer number (10562832).

Almost surely, 2^42221873 is an apocalyptic number.

It is an amenable number.

42221873 is a deficient number, since it is larger than the sum of its proper divisors (29455).

42221873 is a wasteful number, since it uses less digits than its factorization.

42221873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29454.

The product of its digits is 5376, while the sum is 29.

The square root of 42221873 is about 6497.8360244007. The cubic root of 42221873 is about 348.2136822376.

The spelling of 42221873 in words is "forty-two million, two hundred twenty-one thousand, eight hundred seventy-three".