53002521 has 24 divisors (see below), whose sum is σ = 89945856. Its totient is φ = 29651040.

The previous prime is 53002519. The next prime is 53002541. The reversal of 53002521 is 12520035.

It is a happy number.

It is not a de Polignac number, because 53002521 - 2¹ = 53002519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 53002494 and 53002503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53002541) 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, 19305 + ... + 21878.

It is an arithmetic number, because the mean of its divisors is an integer number (3747744).

Almost surely, 2^53002521 is an apocalyptic number.

It is an amenable number.

53002521 is a deficient number, since it is larger than the sum of its proper divisors (36943335).

53002521 is a wasteful number, since it uses less digits than its factorization.

53002521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41213 (or 41210 counting only the distinct ones).

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

The square root of 53002521 is about 7280.2830302125. The cubic root of 53002521 is about 375.6345310487.

Adding to 53002521 its reverse (12520035), we get a palindrome (65522556).

The spelling of 53002521 in words is "fifty-three million, two thousand, five hundred twenty-one".