523210320 has 80 divisors (see below), whose sum is σ = 1802176320. Its totient is φ = 139522176.

The previous prime is 523210249. The next prime is 523210333. The reversal of 523210320 is 23012325.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 523210293 and 523210302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118954 + ... + 123273.

It is an arithmetic number, because the mean of its divisors is an integer number (22527204).

Almost surely, 2^523210320 is an apocalyptic number.

It is an amenable number.

523210320 is an abundant number, since it is smaller than the sum of its proper divisors (1278966000).

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

523210320 is a wasteful number, since it uses less digits than its factorization.

523210320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242249 (or 242237 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 523210320 is about 22873.7911155978. The cubic root of 523210320 is about 805.7966060881.

Adding to 523210320 its reverse (23012325), we get a palindrome (546222645).

The spelling of 523210320 in words is "five hundred twenty-three million, two hundred ten thousand, three hundred twenty".