42231772 has 48 divisors (see below), whose sum is σ = 87091200. Its totient is φ = 17716160.

The previous prime is 42231769. The next prime is 42231779. The reversal of 42231772 is 27713224.

42231772 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 42231772.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42231779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28629 + ... + 30067.

It is an arithmetic number, because the mean of its divisors is an integer number (1814400).

Almost surely, 2^42231772 is an apocalyptic number.

It is an amenable number.

42231772 is an abundant number, since it is smaller than the sum of its proper divisors (44859428).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42231772 is a wasteful number, since it uses less digits than its factorization.

42231772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1506 (or 1504 counting only the distinct ones).

The product of its digits is 4704, while the sum is 28.

The square root of 42231772 is about 6498.5976948877. The cubic root of 42231772 is about 348.2408932355.

Adding to 42231772 its reverse (27713224), we get a palindrome (69944996).

It can be divided in two parts, 4223 and 1772, that added together give a palindrome (5995).

The spelling of 42231772 in words is "forty-two million, two hundred thirty-one thousand, seven hundred seventy-two".