53521312 has 24 divisors (see below), whose sum is σ = 113476356. Its totient is φ = 24701952.

The previous prime is 53521301. The next prime is 53521313. The reversal of 53521312 is 21312535.

It can be written as a sum of positive squares in 2 ways, for example, as 49505296 + 4016016 = 7036^2 + 2004^2 .

It is not an unprimeable number, because it can be changed into a prime (53521313) 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 3 ways as a sum of consecutive naturals, for example, 63913 + ... + 64744.

Almost surely, 2^53521312 is an apocalyptic number.

53521312 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

53521312 is an abundant number, since it is smaller than the sum of its proper divisors (59955044).

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

53521312 is a wasteful number, since it uses less digits than its factorization.

53521312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128680 (or 128672 counting only the distinct ones).

The product of its digits is 900, while the sum is 22.

The square root of 53521312 is about 7315.8261324337. The cubic root of 53521312 is about 376.8561297432.

Adding to 53521312 its reverse (21312535), we get a palindrome (74833847).

The spelling of 53521312 in words is "fifty-three million, five hundred twenty-one thousand, three hundred twelve".