213631382 has 8 divisors (see below), whose sum is σ = 320524776. Its totient is φ = 106789792.

The previous prime is 213631351. The next prime is 213631387. The reversal of 213631382 is 283136312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213631387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83 + ... + 20670.

It is an arithmetic number, because the mean of its divisors is an integer number (40065597).

Almost surely, 2^213631382 is an apocalyptic number.

213631382 is a deficient number, since it is larger than the sum of its proper divisors (106893394).

213631382 is a wasteful number, since it uses less digits than its factorization.

213631382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25902.

The product of its digits is 5184, while the sum is 29.

The square root of 213631382 is about 14616.1343042543. The cubic root of 213631382 is about 597.7987693672.

Adding to 213631382 its reverse (283136312), we get a palindrome (496767694).

The spelling of 213631382 in words is "two hundred thirteen million, six hundred thirty-one thousand, three hundred eighty-two".