523530 has 64 divisors (see below), whose sum is σ = 1601280. Its totient is φ = 119232.

The previous prime is 523519. The next prime is 523541. The reversal of 523530 is 35325.

523530 = 123² + 124² + ... + 150².

523530 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (523519) and next prime (523541).

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1752 + ... + 2028.

It is an arithmetic number, because the mean of its divisors is an integer number (25020).

2⁵²³⁵³⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 523530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (800640).

523530 is an abundant number, since it is smaller than the sum of its proper divisors (1077750).

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

523530 is a wasteful number, since it uses less digits than its factorization.

523530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300 (or 294 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 18.

The square root of 523530 is about 723.5537298639. The cubic root of 523530 is about 80.5960685811.

Adding to 523530 its reverse (35325), we get a palindrome (558855).

The spelling of 523530 in words is "five hundred twenty-three thousand, five hundred thirty".