53211522 has 64 divisors (see below), whose sum is σ = 134233344. Its totient is φ = 13685760.

The previous prime is 53211493. The next prime is 53211527. The reversal of 53211522 is 22511235.

53211522 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (53211527) 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 31 ways as a sum of consecutive naturals, for example, 21198 + ... + 23574.

It is an arithmetic number, because the mean of its divisors is an integer number (2097396).

Almost surely, 2^53211522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53211522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67116672).

53211522 is an abundant number, since it is smaller than the sum of its proper divisors (81021822).

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

53211522 is a wasteful number, since it uses less digits than its factorization.

53211522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2443.

The product of its digits is 600, while the sum is 21.

The square root of 53211522 is about 7294.6228141008. The cubic root of 53211522 is about 376.1276209683.

Adding to 53211522 its reverse (22511235), we get a palindrome (75722757).

It can be divided in two parts, 53 and 211522, that added together give a triangular number (211575 = T₆₅₀).

The spelling of 53211522 in words is "fifty-three million, two hundred eleven thousand, five hundred twenty-two".