213103438464681 has 12 divisors (see below), whose sum is σ = 307823238686340. Its totient is φ = 142065653943840.

The previous prime is 213103438464673. The next prime is 213103438464701. The reversal of 213103438464681 is 186464834301312.

213103438464681 is a `hidden beast` number, since 2 + 1 + 3 + 103 + 4 + 38 + 46 + 468 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 162547200360000 + 50556238104681 = 12749400^2 + 7110291^2 .

It is not a de Polignac number, because 213103438464681 - 2³ = 213103438464673 is a prime.

It is a super-2 number, since 2×213103438464681² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (213103438454681) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 275010990 + ... + 275784791.

It is an arithmetic number, because the mean of its divisors is an integer number (25651936557195).

Almost surely, 2^{213103438464681} is an apocalyptic number.

It is an amenable number.

213103438464681 is a deficient number, since it is larger than the sum of its proper divisors (94719800221659).

213103438464681 is a wasteful number, since it uses less digits than its factorization.

213103438464681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550838776 (or 550838773 counting only the distinct ones).

The product of its (nonzero) digits is 7962624, while the sum is 54.

The spelling of 213103438464681 in words is "two hundred thirteen trillion, one hundred three billion, four hundred thirty-eight million, four hundred sixty-four thousand, six hundred eighty-one".