213230540 has 48 divisors (see below), whose sum is σ = 481420800. Its totient is φ = 79077312.

The previous prime is 213230527. The next prime is 213230579. The reversal of 213230540 is 45032312.

It is a happy number.

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

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, 11891 + ... + 23829.

It is an arithmetic number, because the mean of its divisors is an integer number (10029600).

Almost surely, 2^213230540 is an apocalyptic number.

213230540 is a gapful number since it is divisible by the number (20) 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 213230540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (240710400).

213230540 is an abundant number, since it is smaller than the sum of its proper divisors (268190260).

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

213230540 is a wasteful number, since it uses less digits than its factorization.

213230540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12014 (or 12012 counting only the distinct ones).

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

The square root of 213230540 is about 14602.4155535993. The cubic root of 213230540 is about 597.4246469284.

Adding to 213230540 its reverse (45032312), we get a palindrome (258262852).

The spelling of 213230540 in words is "two hundred thirteen million, two hundred thirty thousand, five hundred forty".