42213811 has 4 divisors (see below), whose sum is σ = 43010352. Its totient is φ = 41417272.

The previous prime is 42213799. The next prime is 42213841. The reversal of 42213811 is 11831224.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 42213811 - 2⁵ = 42213779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42213841) 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, 398191 + ... + 398296.

It is an arithmetic number, because the mean of its divisors is an integer number (10752588).

Almost surely, 2^42213811 is an apocalyptic number.

42213811 is a deficient number, since it is larger than the sum of its proper divisors (796541).

42213811 is an equidigital number, since it uses as much as digits as its factorization.

42213811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796540.

The product of its digits is 384, while the sum is 22.

The square root of 42213811 is about 6497.2156344083. The cubic root of 42213811 is about 348.1915177590.

The spelling of 42213811 in words is "forty-two million, two hundred thirteen thousand, eight hundred eleven".