42223131 has 6 divisors (see below), whose sum is σ = 60988980. Its totient is φ = 28148748.

The previous prime is 42223117. The next prime is 42223133. The reversal of 42223131 is 13132224.

It is not a de Polignac number, because 42223131 - 2¹⁰ = 42222107 is a prime.

It is a super-2 number, since 2×42223131² = 3565585582886322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42223133) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2345721 + ... + 2345738.

It is an arithmetic number, because the mean of its divisors is an integer number (10164830).

Almost surely, 2^42223131 is an apocalyptic number.

42223131 is a deficient number, since it is larger than the sum of its proper divisors (18765849).

42223131 is a wasteful number, since it uses less digits than its factorization.

42223131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4691465 (or 4691462 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 42223131 is about 6497.9328251375. The cubic root of 42223131 is about 348.2171405435.

Adding to 42223131 its reverse (13132224), we get a palindrome (55355355).

The spelling of 42223131 in words is "forty-two million, two hundred twenty-three thousand, one hundred thirty-one".