51574842 has 48 divisors (see below), whose sum is σ = 123158880. Its totient is φ = 15468000.

The previous prime is 51574837. The next prime is 51574849. The reversal of 51574842 is 24847515.

51574842 is a `hidden beast` number, since 5 + 1 + 574 + 84 + 2 = 666.

51574842 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 51574797 and 51574806.

It is not an unprimeable number, because it can be changed into a prime (51574849) 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 23 ways as a sum of consecutive naturals, for example, 18709 + ... + 21287.

It is an arithmetic number, because the mean of its divisors is an integer number (2565810).

Almost surely, 2^51574842 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51574842, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61579440).

51574842 is an abundant number, since it is smaller than the sum of its proper divisors (71584038).

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

51574842 is a wasteful number, since it uses less digits than its factorization.

51574842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2699 (or 2696 counting only the distinct ones).

The product of its digits is 44800, while the sum is 36.

The square root of 51574842 is about 7181.5626433249. The cubic root of 51574842 is about 372.2310825775.

It can be divided in two parts, 5157 and 4842, that added together give a palindrome (9999).

The spelling of 51574842 in words is "fifty-one million, five hundred seventy-four thousand, eight hundred forty-two".