52503021 has 24 divisors (see below), whose sum is σ = 83074680. Its totient is φ = 31804416.

The previous prime is 52503007. The next prime is 52503029. The reversal of 52503021 is 12030525.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 28355625 + 24147396 = 5325^2 + 4914^2 .

It is a de Polignac number, because none of the positive numbers 2^k-52503021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 52502985 and 52503003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52503029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1480 + ... + 10353.

It is an arithmetic number, because the mean of its divisors is an integer number (3461445).

Almost surely, 2^52503021 is an apocalyptic number.

52503021 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

52503021 is a deficient number, since it is larger than the sum of its proper divisors (30571659).

52503021 is a wasteful number, since it uses less digits than its factorization.

52503021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11885 (or 11882 counting only the distinct ones).

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

The square root of 52503021 is about 7245.8968389013. The cubic root of 52503021 is about 374.4508014084.

Adding to 52503021 its reverse (12030525), we get a palindrome (64533546).

The spelling of 52503021 in words is "fifty-two million, five hundred three thousand, twenty-one".