53012500 has 36 divisors (see below), whose sum is σ = 115984764. Its totient is φ = 21200000.

The previous prime is 53012471. The next prime is 53012501. The reversal of 53012500 is 521035.

It can be written as a sum of positive squares in 6 ways, for example, as 27751824 + 25260676 = 5268^2 + 5026^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53012501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10380 + ... + 14620.

It is an arithmetic number, because the mean of its divisors is an integer number (3221799).

Almost surely, 2^53012500 is an apocalyptic number.

53012500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53012500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57992382).

53012500 is an abundant number, since it is smaller than the sum of its proper divisors (62972264).

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

53012500 is an equidigital number, since it uses as much as digits as its factorization.

53012500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4270 (or 4248 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 16.

The square root of 53012500 is about 7280.9683421919. The cubic root of 53012500 is about 375.6581036492.

Adding to 53012500 its reverse (521035), we get a palindrome (53533535).

The spelling of 53012500 in words is "fifty-three million, twelve thousand, five hundred".