42022231 has 4 divisors (see below), whose sum is σ = 42597952. Its totient is φ = 41446512.

The previous prime is 42022207. The next prime is 42022241. The reversal of 42022231 is 13222024.

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 42022231 - 2⁷ = 42022103 is a prime.

It is a super-2 number, since 2×42022231² = 3531735796434722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42022241) 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, 287751 + ... + 287896.

It is an arithmetic number, because the mean of its divisors is an integer number (10649488).

Almost surely, 2^42022231 is an apocalyptic number.

42022231 is a deficient number, since it is larger than the sum of its proper divisors (575721).

42022231 is an equidigital number, since it uses as much as digits as its factorization.

42022231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575720.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 42022231 is about 6482.4556303919. The cubic root of 42022231 is about 347.6639834713.

Adding to 42022231 its reverse (13222024), we get a palindrome (55244255).

The spelling of 42022231 in words is "forty-two million, twenty-two thousand, two hundred thirty-one".