531230100 has 72 divisors (see below), whose sum is σ = 1563129120. Its totient is φ = 139255680.

The previous prime is 531230099. The next prime is 531230107. The reversal of 531230100 is 1032135.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 531230100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531230107) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2694 + ... + 32706.

Almost surely, 2^531230100 is an apocalyptic number.

531230100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 531230100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (781564560).

531230100 is an abundant number, since it is smaller than the sum of its proper divisors (1031899020).

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

531230100 is a wasteful number, since it uses less digits than its factorization.

531230100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30089 (or 30082 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 531230100 is about 23048.4294475784. The cubic root of 531230100 is about 809.8928375225.

Adding to 531230100 its reverse (1032135), we get a palindrome (532262235).

The spelling of 531230100 in words is "five hundred thirty-one million, two hundred thirty thousand, one hundred".