51580420 has 24 divisors (see below), whose sum is σ = 109335744. Its totient is φ = 20438496.

The previous prime is 51580409. The next prime is 51580423. The reversal of 51580420 is 2408515.

51580420 = 230² + 231² + ... + 550².

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 not an unprimeable number, because it can be changed into a prime (51580423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9912 + ... + 14191.

It is an arithmetic number, because the mean of its divisors is an integer number (4555656).

Almost surely, 2^51580420 is an apocalyptic number.

It is an amenable number.

51580420 is an abundant number, since it is smaller than the sum of its proper divisors (57755324).

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

51580420 is a wasteful number, since it uses less digits than its factorization.

51580420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24219 (or 24217 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 51580420 is about 7181.9509884153. The cubic root of 51580420 is about 372.2445014593.

Adding to 51580420 its reverse (2408515), we get a palindrome (53988935).

The spelling of 51580420 in words is "fifty-one million, five hundred eighty thousand, four hundred twenty".