42223531 has 8 divisors (see below), whose sum is σ = 49282560. Its totient is φ = 35421288.

The previous prime is 42223523. The next prime is 42223543. The reversal of 42223531 is 13532224.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42223531 - 2³ = 42223523 is a prime.

It is a super-2 number, since 2×42223531² = 3565653140215922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42223231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63841 + ... + 64498.

It is an arithmetic number, because the mean of its divisors is an integer number (6160320).

Almost surely, 2^42223531 is an apocalyptic number.

42223531 is a deficient number, since it is larger than the sum of its proper divisors (7059029).

42223531 is a wasteful number, since it uses less digits than its factorization.

42223531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128393.

The product of its digits is 1440, while the sum is 22.

The square root of 42223531 is about 6497.9636040840. The cubic root of 42223531 is about 348.2182401495.

Adding to 42223531 its reverse (13532224), we get a palindrome (55755755).

The spelling of 42223531 in words is "forty-two million, two hundred twenty-three thousand, five hundred thirty-one".