53120520 has 48 divisors (see below), whose sum is σ = 172642860. Its totient is φ = 14165376.

The previous prime is 53120519. The next prime is 53120537. The reversal of 53120520 is 2502135.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 49364676 + 3755844 = 7026^2 + 1938^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 53120493 and 53120502.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73419 + ... + 74138.

Almost surely, 2^53120520 is an apocalyptic number.

It is an amenable number.

53120520 is an abundant number, since it is smaller than the sum of its proper divisors (119522340).

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

53120520 is a wasteful number, since it uses less digits than its factorization.

53120520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147574 (or 147567 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 53120520 is about 7288.3825366126. The cubic root of 53120520 is about 375.9130816141.

Adding to 53120520 its reverse (2502135), we get a palindrome (55622655).

The spelling of 53120520 in words is "fifty-three million, one hundred twenty thousand, five hundred twenty".