51360280 has 16 divisors (see below), whose sum is σ = 115560720. Its totient is φ = 20544096.

The previous prime is 51360269. The next prime is 51360293. The reversal of 51360280 is 8206315.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 641964 + ... + 642043.

It is an arithmetic number, because the mean of its divisors is an integer number (7222545).

Almost surely, 2^51360280 is an apocalyptic number.

It is an amenable number.

51360280 is an abundant number, since it is smaller than the sum of its proper divisors (64200440).

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

51360280 is a wasteful number, since it uses less digits than its factorization.

51360280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1284018 (or 1284014 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 51360280 is about 7166.6086819360. The cubic root of 51360280 is about 371.7141790314.

Adding to 51360280 its reverse (8206315), we get a palindrome (59566595).

The spelling of 51360280 in words is "fifty-one million, three hundred sixty thousand, two hundred eighty".