213636996 has 72 divisors (see below), whose sum is σ = 569447424. Its totient is φ = 67432320.

The previous prime is 213636991. The next prime is 213637003. The reversal of 213636996 is 699636312.

It is a happy number.

213636996 is a `hidden beast` number, since 2 + 1 + 3 + 636 + 9 + 9 + 6 = 666.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (213636991) 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, 50416 + ... + 54488.

It is an arithmetic number, because the mean of its divisors is an integer number (7908992).

Almost surely, 2^213636996 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213636996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284723712).

213636996 is an abundant number, since it is smaller than the sum of its proper divisors (355810428).

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

213636996 is a wasteful number, since it uses less digits than its factorization.

213636996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4161 (or 4156 counting only the distinct ones).

The product of its digits is 314928, while the sum is 45.

The square root of 213636996 is about 14616.3263510364. The cubic root of 213636996 is about 597.8040058214.

The spelling of 213636996 in words is "two hundred thirteen million, six hundred thirty-six thousand, nine hundred ninety-six".