42551432 has 64 divisors (see below), whose sum is σ = 101053440. Its totient is φ = 16315200.

The previous prime is 42551429. The next prime is 42551441. The reversal of 42551432 is 23415524.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40757 + ... + 41787.

It is an arithmetic number, because the mean of its divisors is an integer number (1578960).

Almost surely, 2^42551432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42551432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50526720).

42551432 is an abundant number, since it is smaller than the sum of its proper divisors (58502008).

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

42551432 is a wasteful number, since it uses less digits than its factorization.

42551432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122 (or 1118 counting only the distinct ones).

The product of its digits is 4800, while the sum is 26.

The square root of 42551432 is about 6523.1458668345. The cubic root of 42551432 is about 349.1173186532.

Adding to 42551432 its reverse (23415524), we get a palindrome (65966956).

The spelling of 42551432 in words is "forty-two million, five hundred fifty-one thousand, four hundred thirty-two".