53233220 has 12 divisors (see below), whose sum is σ = 111789804. Its totient is φ = 21293280.

The previous prime is 53233199. The next prime is 53233237. The reversal of 53233220 is 2233235.

It can be written as a sum of positive squares in 2 ways, for example, as 40729924 + 12503296 = 6382^2 + 3536^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 2661661 = 53233220 / (5 + 3 + 2 + 3 + 3 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 53233192 and 53233201.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1330811 + ... + 1330850.

It is an arithmetic number, because the mean of its divisors is an integer number (9315817).

Almost surely, 2^53233220 is an apocalyptic number.

It is an amenable number.

53233220 is an abundant number, since it is smaller than the sum of its proper divisors (58556584).

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

53233220 is a wasteful number, since it uses less digits than its factorization.

53233220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2661670 (or 2661668 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 20.

The square root of 53233220 is about 7296.1099224176. The cubic root of 53233220 is about 376.1787383941.

Adding to 53233220 its reverse (2233235), we get a palindrome (55466455).

The spelling of 53233220 in words is "fifty-three million, two hundred thirty-three thousand, two hundred twenty".