51442432 has 36 divisors (see below), whose sum is σ = 105478576. Its totient is φ = 25021440.

The previous prime is 51442429. The next prime is 51442451. The reversal of 51442432 is 23424415.

It is a happy number.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 51442397 and 51442406.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6757 + ... + 12187.

Almost surely, 2^51442432 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 51442432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52739288).

51442432 is an abundant number, since it is smaller than the sum of its proper divisors (54036144).

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

51442432 is an equidigital number, since it uses as much as digits as its factorization.

51442432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5484 (or 5470 counting only the distinct ones).

The product of its digits is 3840, while the sum is 25.

The square root of 51442432 is about 7172.3379730741. The cubic root of 51442432 is about 371.9122620384.

Adding to 51442432 its reverse (23424415), we get a palindrome (74866847).

The spelling of 51442432 in words is "fifty-one million, four hundred forty-two thousand, four hundred thirty-two".