523432530 has 80 divisors (see below), whose sum is σ = 1417224600. Its totient is φ = 138613248.

The previous prime is 523432529. The next prime is 523432531. The reversal of 523432530 is 35234325.

It is an interprime number because it is at equal distance from previous prime (523432529) and next prime (523432531).

It can be written as a sum of positive squares in 4 ways, for example, as 143065521 + 380367009 = 11961^2 + 19503^2 .

It is a super-2 number, since 2×523432530² = 547963226924401800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 523432494 and 523432503.

It is not an unprimeable number, because it can be changed into a prime (523432531) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 118522 + ... + 122858.

Almost surely, 2^523432530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 523432530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (708612300).

523432530 is an abundant number, since it is smaller than the sum of its proper divisors (893792070).

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

523432530 is a wasteful number, since it uses less digits than its factorization.

523432530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4505 (or 4496 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 27.

The square root of 523432530 is about 22878.6479058532. The cubic root of 523432530 is about 805.9106652050.

Adding to 523432530 its reverse (35234325), we get a palindrome (558666855).

The spelling of 523432530 in words is "five hundred twenty-three million, four hundred thirty-two thousand, five hundred thirty".