213023140 has 48 divisors (see below), whose sum is σ = 492899904. Its totient is φ = 76688000.

The previous prime is 213023131. The next prime is 213023143. The reversal of 213023140 is 41320312.

It is a happy number.

213023140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (213023143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17427 + ... + 27013.

It is an arithmetic number, because the mean of its divisors is an integer number (10268748).

Almost surely, 2^213023140 is an apocalyptic number.

213023140 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 213023140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246449952).

213023140 is an abundant number, since it is smaller than the sum of its proper divisors (279876764).

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

213023140 is a wasteful number, since it uses less digits than its factorization.

213023140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9708 (or 9706 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 213023140 is about 14595.3122611337. The cubic root of 213023140 is about 597.2308878385.

Adding to 213023140 its reverse (41320312), we get a palindrome (254343452).

It can be divided in two parts, 21302 and 3140, that added together give a palindrome (24442).

The spelling of 213023140 in words is "two hundred thirteen million, twenty-three thousand, one hundred forty".