51045424 has 40 divisors (see below), whose sum is σ = 106319088. Its totient is φ = 23654400.

The previous prime is 51045383. The next prime is 51045497. The reversal of 51045424 is 42454015.

It is a happy number.

It is a super-2 number, since 2×51045424² = 5211270622679552, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16824 + ... + 19624.

Almost surely, 2^51045424 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 51045424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53159544).

51045424 is an abundant number, since it is smaller than the sum of its proper divisors (55273664).

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

51045424 is a wasteful number, since it uses less digits than its factorization.

51045424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2893 (or 2887 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 51045424 is about 7144.6080368345. The cubic root of 51045424 is about 370.9530434149.

Adding to 51045424 its reverse (42454015), we get a palindrome (93499439).

The spelling of 51045424 in words is "fifty-one million, forty-five thousand, four hundred twenty-four".