51314420 has 24 divisors (see below), whose sum is σ = 109529448. Its totient is φ = 20188800.

The previous prime is 51314413. The next prime is 51314423. The reversal of 51314420 is 2441315.

It can be written as a sum of positive squares in 4 ways, for example, as 7171684 + 44142736 = 2678^2 + 6644^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 51314392 and 51314401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51314423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19811 + ... + 22250.

It is an arithmetic number, because the mean of its divisors is an integer number (4563727).

Almost surely, 2^51314420 is an apocalyptic number.

It is an amenable number.

51314420 is an abundant number, since it is smaller than the sum of its proper divisors (58215028).

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

51314420 is a wasteful number, since it uses less digits than its factorization.

51314420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42131 (or 42129 counting only the distinct ones).

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

The square root of 51314420 is about 7163.4084066176. The cubic root of 51314420 is about 371.6035105764.

Adding to 51314420 its reverse (2441315), we get a palindrome (53755735).

The spelling of 51314420 in words is "fifty-one million, three hundred fourteen thousand, four hundred twenty".