213652681 has 32 divisors (see below), whose sum is σ = 255467520. Its totient is φ = 176668800.

The previous prime is 213652679. The next prime is 213652717. The reversal of 213652681 is 186256312.

It is not a de Polignac number, because 213652681 - 2¹ = 213652679 is a prime.

It is a super-2 number, since 2×213652681² = 91294936196975522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (213652601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 445800 + ... + 446278.

It is an arithmetic number, because the mean of its divisors is an integer number (7983360).

Almost surely, 2^213652681 is an apocalyptic number.

It is an amenable number.

213652681 is a deficient number, since it is larger than the sum of its proper divisors (41814839).

213652681 is a wasteful number, since it uses less digits than its factorization.

213652681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597.

The product of its digits is 17280, while the sum is 34.

The square root of 213652681 is about 14616.8628987208. The cubic root of 213652681 is about 597.8186355072.

The spelling of 213652681 in words is "two hundred thirteen million, six hundred fifty-two thousand, six hundred eighty-one".