53021528 has 48 divisors (see below), whose sum is σ = 118503000. Its totient is φ = 22162560.

The previous prime is 53021513. The next prime is 53021543. The reversal of 53021528 is 82512035.

It is an interprime number because it is at equal distance from previous prime (53021513) and next prime (53021543).

It is a super-2 number, since 2×53021528² = 5622564862909568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 53021497 and 53021506.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14423 + ... + 17721.

Almost surely, 2^53021528 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53021528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59251500).

53021528 is an abundant number, since it is smaller than the sum of its proper divisors (65481472).

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

53021528 is a wasteful number, since it uses less digits than its factorization.

53021528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3360 (or 3349 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 53021528 is about 7281.5882882789. The cubic root of 53021528 is about 375.6794272292.

The spelling of 53021528 in words is "fifty-three million, twenty-one thousand, five hundred twenty-eight".