213241140 has 144 divisors (see below), whose sum is σ = 771825600. Its totient is φ = 48734784.

The previous prime is 213241139. The next prime is 213241141. The reversal of 213241140 is 41142312.

213241140 is a `hidden beast` number, since 213 + 2 + 411 + 40 = 666.

It is an interprime number because it is at equal distance from previous prime (213241139) and next prime (213241141).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213241141) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22431 + ... + 30489.

It is an arithmetic number, because the mean of its divisors is an integer number (5359900).

Almost surely, 2^213241140 is an apocalyptic number.

213241140 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 213241140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (385912800).

213241140 is an abundant number, since it is smaller than the sum of its proper divisors (558584460).

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

213241140 is a wasteful number, since it uses less digits than its factorization.

213241140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8091 (or 8076 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 213241140 is about 14602.7785027371. The cubic root of 213241140 is about 597.4345463802.

Adding to 213241140 its reverse (41142312), we get a palindrome (254383452).

The spelling of 213241140 in words is "two hundred thirteen million, two hundred forty-one thousand, one hundred forty".