213786722349 has 24 divisors (see below), whose sum is σ = 317135295360. Its totient is φ = 138712711488.

The previous prime is 213786722339. The next prime is 213786722399. The reversal of 213786722349 is 943227687312.

It is a happy number.

213786722349 is a `hidden beast` number, since 2 + 1 + 378 + 6 + 7 + 223 + 49 = 666.

It is not a de Polignac number, because 213786722349 - 2¹³ = 213786714157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213786722295 and 213786722304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213786722329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1336032 + ... + 1487465.

It is an arithmetic number, because the mean of its divisors is an integer number (13213970640).

Almost surely, 2^213786722349 is an apocalyptic number.

It is an amenable number.

213786722349 is a deficient number, since it is larger than the sum of its proper divisors (103348573011).

213786722349 is a wasteful number, since it uses less digits than its factorization.

213786722349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2823729 (or 2823726 counting only the distinct ones).

The product of its digits is 6096384, while the sum is 54.

The spelling of 213786722349 in words is "two hundred thirteen billion, seven hundred eighty-six million, seven hundred twenty-two thousand, three hundred forty-nine".