53531220 has 48 divisors (see below), whose sum is σ = 150554880. Its totient is φ = 14211456.

The previous prime is 53531213. The next prime is 53531239. The reversal of 53531220 is 2213535.

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 15 ways as a sum of consecutive naturals, for example, 12474 + ... + 16206.

It is an arithmetic number, because the mean of its divisors is an integer number (3136560).

Almost surely, 2^53531220 is an apocalyptic number.

It is an amenable number.

53531220 is an abundant number, since it is smaller than the sum of its proper divisors (97023660).

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

53531220 is a wasteful number, since it uses less digits than its factorization.

53531220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3984 (or 3982 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 53531220 is about 7316.5032631716. The cubic root of 53531220 is about 376.8793831601.

Adding to 53531220 its reverse (2213535), we get a palindrome (55744755).

The spelling of 53531220 in words is "fifty-three million, five hundred thirty-one thousand, two hundred twenty".