51413420 has 12 divisors (see below), whose sum is σ = 107968224. Its totient is φ = 20565360.

The previous prime is 51413419. The next prime is 51413429. The reversal of 51413420 is 2431415.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 2570671 = 51413420 / (5 + 1 + 4 + 1 + 3 + 4 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 51413392 and 51413401.

It is not an unprimeable number, because it can be changed into a prime (51413429) 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, 1285316 + ... + 1285355.

It is an arithmetic number, because the mean of its divisors is an integer number (8997352).

Almost surely, 2^51413420 is an apocalyptic number.

It is an amenable number.

51413420 is an abundant number, since it is smaller than the sum of its proper divisors (56554804).

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

51413420 is a wasteful number, since it uses less digits than its factorization.

51413420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2570680 (or 2570678 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 51413420 is about 7170.3151953035. The cubic root of 51413420 is about 371.8423330766.

Adding to 51413420 its reverse (2431415), we get a palindrome (53844835).

The spelling of 51413420 in words is "fifty-one million, four hundred thirteen thousand, four hundred twenty".