213741631684 has 27 divisors (see below), whose sum is σ = 435130069647. Its totient is φ = 91600782504.

The previous prime is 213741631681. The next prime is 213741631699. The reversal of 213741631684 is 486136147312.

The square root of 213741631684 is 462322.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×213741631684² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (213741631681) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6455997 + ... + 6489019.

Almost surely, 2^213741631684 is an apocalyptic number.

213741631684 is the 462322-nd square number.

It is an amenable number.

213741631684 is an abundant number, since it is smaller than the sum of its proper divisors (221388437963).

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

213741631684 is an frugal number, since it uses more digits than its factorization.

213741631684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66064 (or 33032 counting only the distinct ones).

The product of its digits is 580608, while the sum is 46.

Adding to 213741631684 its reverse (486136147312), we get a palindrome (699877778996).

The spelling of 213741631684 in words is "two hundred thirteen billion, seven hundred forty-one million, six hundred thirty-one thousand, six hundred eighty-four".