53631220 has 12 divisors (see below), whose sum is σ = 112625604. Its totient is φ = 21452480.

The previous prime is 53631217. The next prime is 53631229. The reversal of 53631220 is 2213635.

53631220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 14167696 + 39463524 = 3764^2 + 6282^2 .

It is a junction number, because it is equal to n+sod(n) for n = 53631191 and 53631200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53631229) 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 3 ways as a sum of consecutive naturals, for example, 1340761 + ... + 1340800.

It is an arithmetic number, because the mean of its divisors is an integer number (9385467).

Almost surely, 2^53631220 is an apocalyptic number.

It is an amenable number.

53631220 is an abundant number, since it is smaller than the sum of its proper divisors (58994384).

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

53631220 is a wasteful number, since it uses less digits than its factorization.

53631220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2681570 (or 2681568 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 53631220 is about 7323.3339402215. Note that the first 3 decimals coincide. The cubic root of 53631220 is about 377.1139160474.

Adding to 53631220 its reverse (2213635), we get a palindrome (55844855).

The spelling of 53631220 in words is "fifty-three million, six hundred thirty-one thousand, two hundred twenty".