523321220 has 24 divisors (see below), whose sum is σ = 1105562304. Its totient is φ = 208073696.

The previous prime is 523321189. The next prime is 523321243. The reversal of 523321220 is 22123325.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 523321192 and 523321201.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75002 + ... + 81681.

It is an arithmetic number, because the mean of its divisors is an integer number (46065096).

Almost surely, 2^523321220 is an apocalyptic number.

It is an amenable number.

523321220 is an abundant number, since it is smaller than the sum of its proper divisors (582241084).

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

523321220 is a wasteful number, since it uses less digits than its factorization.

523321220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156859 (or 156857 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 523321220 is about 22876.2151589812. The cubic root of 523321220 is about 805.8535344572.

Adding to 523321220 its reverse (22123325), we get a palindrome (545444545).

The spelling of 523321220 in words is "five hundred twenty-three million, three hundred twenty-one thousand, two hundred twenty".