42551232 has 28 divisors (see below), whose sum is σ = 112583976. Its totient is φ = 14183680.

The previous prime is 42551191. The next prime is 42551237. The reversal of 42551232 is 23215524.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42551237) 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, 110619 + ... + 111002.

Almost surely, 2^42551232 is an apocalyptic number.

It is an amenable number.

42551232 is an abundant number, since it is smaller than the sum of its proper divisors (70032744).

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

42551232 is a wasteful number, since it uses less digits than its factorization.

42551232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221636 (or 221626 counting only the distinct ones).

The product of its digits is 2400, while the sum is 24.

The square root of 42551232 is about 6523.1305367898. The cubic root of 42551232 is about 349.1167716792.

Adding to 42551232 its reverse (23215524), we get a palindrome (65766756).

The spelling of 42551232 in words is "forty-two million, five hundred fifty-one thousand, two hundred thirty-two".