51200320 has 28 divisors (see below), whose sum is σ = 121921524. Its totient is φ = 20480000.

The previous prime is 51200309. The next prime is 51200329. The reversal of 51200320 is 2300215.

It can be written as a sum of positive squares in 2 ways, for example, as 40857664 + 10342656 = 6392^2 + 3216^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51200320.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51200329) 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, 79681 + ... + 80320.

Almost surely, 2^51200320 is an apocalyptic number.

It is an amenable number.

51200320 is an abundant number, since it is smaller than the sum of its proper divisors (70721204).

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

51200320 is a wasteful number, since it uses less digits than its factorization.

51200320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160018 (or 160008 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 51200320 is about 7155.4398886442. The cubic root of 51200320 is about 371.3278802855.

Adding to 51200320 its reverse (2300215), we get a palindrome (53500535).

The spelling of 51200320 in words is "fifty-one million, two hundred thousand, three hundred twenty".