53231620 has 36 divisors (see below), whose sum is σ = 121054500. Its totient is φ = 19653504.

The previous prime is 53231609. The next prime is 53231621. The reversal of 53231620 is 2613235.

It can be written as a sum of positive squares in 6 ways, for example, as 26378496 + 26853124 = 5136^2 + 5182^2 .

It is a junction number, because it is equal to n+sod(n) for n = 53231591 and 53231600.

It is not an unprimeable number, because it can be changed into a prime (53231621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4495 + ... + 11254.

It is an arithmetic number, because the mean of its divisors is an integer number (3362625).

Almost surely, 2^53231620 is an apocalyptic number.

It is an amenable number.

53231620 is an abundant number, since it is smaller than the sum of its proper divisors (67822880).

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

53231620 is a wasteful number, since it uses less digits than its factorization.

53231620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15784 (or 15769 counting only the distinct ones).

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

The square root of 53231620 is about 7296.0002741228. Note that the first 3 decimals coincide. The cubic root of 53231620 is about 376.1749694943.

Adding to 53231620 its reverse (2613235), we get a palindrome (55844855).

The spelling of 53231620 in words is "fifty-three million, two hundred thirty-one thousand, six hundred twenty".