213636642 has 32 divisors (see below), whose sum is σ = 439084800. Its totient is φ = 69258000.

The previous prime is 213636641. The next prime is 213636677. The reversal of 213636642 is 246636312.

It is a super-2 number, since 2×213636642² = 91281229610072328, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (213636641) 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, 63109 + ... + 66407.

It is an arithmetic number, because the mean of its divisors is an integer number (13721400).

Almost surely, 2^213636642 is an apocalyptic number.

213636642 is an abundant number, since it is smaller than the sum of its proper divisors (225448158).

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

213636642 is a wasteful number, since it uses less digits than its factorization.

213636642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3598.

The product of its digits is 31104, while the sum is 33.

The square root of 213636642 is about 14616.3142412853. The cubic root of 213636642 is about 597.8036756309.

The spelling of 213636642 in words is "two hundred thirteen million, six hundred thirty-six thousand, six hundred forty-two".