51360520 has 32 divisors (see below), whose sum is σ = 116714520. Its totient is φ = 20339200.

The previous prime is 51360499. The next prime is 51360523. The reversal of 51360520 is 2506315.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 50779876 + 580644 = 7126^2 + 762^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51360491 and 51360500.

It is not an unprimeable number, because it can be changed into a prime (51360523) 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, 2317 + ... + 10396.

Almost surely, 2^51360520 is an apocalyptic number.

It is an amenable number.

51360520 is an abundant number, since it is smaller than the sum of its proper divisors (65354000).

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

51360520 is a wasteful number, since it uses less digits than its factorization.

51360520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12825 (or 12821 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 51360520 is about 7166.6254262379. The cubic root of 51360520 is about 371.7147580214.

Adding to 51360520 its reverse (2506315), we get a palindrome (53866835).

The spelling of 51360520 in words is "fifty-one million, three hundred sixty thousand, five hundred twenty".