51072442 has 8 divisors (see below), whose sum is σ = 76640832. Its totient is φ = 25525500.

The previous prime is 51072391. The next prime is 51072449. The reversal of 51072442 is 24427015.

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

It is not an unprimeable number, because it can be changed into a prime (51072449) 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, 3567 + ... + 10717.

It is an arithmetic number, because the mean of its divisors is an integer number (9580104).

Almost surely, 2^51072442 is an apocalyptic number.

51072442 is a deficient number, since it is larger than the sum of its proper divisors (25568390).

51072442 is a wasteful number, since it uses less digits than its factorization.

51072442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10724.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 51072442 is about 7146.4985832224. The cubic root of 51072442 is about 371.0184795226.

Adding to 51072442 its reverse (24427015), we get a palindrome (75499457).

The spelling of 51072442 in words is "fifty-one million, seventy-two thousand, four hundred forty-two".