51052520 has 16 divisors (see below), whose sum is σ = 114868260. Its totient is φ = 20420992.

The previous prime is 51052517. The next prime is 51052531. The reversal of 51052520 is 2525015.

It can be written as a sum of positive squares in 2 ways, for example, as 45454564 + 5597956 = 6742^2 + 2366^2 .

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 = 51052492 and 51052501.

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, 638117 + ... + 638196.

Almost surely, 2^51052520 is an apocalyptic number.

It is an amenable number.

51052520 is an abundant number, since it is smaller than the sum of its proper divisors (63815740).

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

51052520 is a wasteful number, since it uses less digits than its factorization.

51052520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1276324 (or 1276320 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 51052520 is about 7145.1046178485. The cubic root of 51052520 is about 370.9702317714.

Adding to 51052520 its reverse (2525015), we get a palindrome (53577535).

The spelling of 51052520 in words is "fifty-one million, fifty-two thousand, five hundred twenty".