53021436 has 48 divisors (see below), whose sum is σ = 141077664. Its totient is φ = 15353856.

The previous prime is 53021431. The next prime is 53021447. The reversal of 53021436 is 63412035.

It is a happy number.

53021436 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×53021436² = 5622545351004192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53021431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7345 + ... + 12648.

It is an arithmetic number, because the mean of its divisors is an integer number (2939118).

Almost surely, 2^53021436 is an apocalyptic number.

It is an amenable number.

53021436 is an abundant number, since it is smaller than the sum of its proper divisors (88056228).

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

53021436 is a wasteful number, since it uses less digits than its factorization.

53021436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20030 (or 20028 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 53021436 is about 7281.5819709731. The cubic root of 53021436 is about 375.6792099431.

The spelling of 53021436 in words is "fifty-three million, twenty-one thousand, four hundred thirty-six".