42222231 has 12 divisors (see below), whose sum is σ = 63091080. Its totient is φ = 27177360.

The previous prime is 42222221. The next prime is 42222233. The reversal of 42222231 is 13222224.

It is not a de Polignac number, because 42222231 - 2¹⁵ = 42189463 is a prime.

It is a super-2 number, since 2×42222231² = 3565433581234722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42222233) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80625 + ... + 81146.

It is an arithmetic number, because the mean of its divisors is an integer number (5257590).

Almost surely, 2^42222231 is an apocalyptic number.

42222231 is a deficient number, since it is larger than the sum of its proper divisors (20868849).

42222231 is a wasteful number, since it uses less digits than its factorization.

42222231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161806 (or 161803 counting only the distinct ones).

The product of its digits is 384, while the sum is 18.

The square root of 42222231 is about 6497.8635719750. The cubic root of 42222231 is about 348.2146664048.

Adding to 42222231 its reverse (13222224), we get a palindrome (55444455).

It can be divided in two parts, 4222223 and 1, that added together give a palindrome (4222224).

The spelling of 42222231 in words is "forty-two million, two hundred twenty-two thousand, two hundred thirty-one".