53221532 has 24 divisors (see below), whose sum is σ = 114631776. Its totient is φ = 21054528.

The previous prime is 53221523. The next prime is 53221537. The reversal of 53221532 is 23512235.

It is a junction number, because it is equal to n+sod(n) for n = 53221498 and 53221507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53221537) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 72743 + ... + 73470.

It is an arithmetic number, because the mean of its divisors is an integer number (4776324).

Almost surely, 2^53221532 is an apocalyptic number.

53221532 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

53221532 is an abundant number, since it is smaller than the sum of its proper divisors (61410244).

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

53221532 is a wasteful number, since it uses less digits than its factorization.

53221532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146237 (or 146235 counting only the distinct ones).

The product of its digits is 1800, while the sum is 23.

The square root of 53221532 is about 7295.3089036723. The cubic root of 53221532 is about 376.1512048419.

Adding to 53221532 its reverse (23512235), we get a palindrome (76733767).

The spelling of 53221532 in words is "fifty-three million, two hundred twenty-one thousand, five hundred thirty-two".