213727687956 has 72 divisors (see below), whose sum is σ = 563822610624. Its totient is φ = 68135738880.

The previous prime is 213727687951. The next prime is 213727687961. The reversal of 213727687956 is 659786727312.

It is an interprime number because it is at equal distance from previous prime (213727687951) and next prime (213727687961).

It is a junction number, because it is equal to n+sod(n) for n = 213727687893 and 213727687902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213727687951) 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, 8546551 + ... + 8571521.

It is an arithmetic number, because the mean of its divisors is an integer number (7830869592).

Almost surely, 2^213727687956 is an apocalyptic number.

It is an amenable number.

213727687956 is an abundant number, since it is smaller than the sum of its proper divisors (350094922668).

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

213727687956 is a wasteful number, since it uses less digits than its factorization.

213727687956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35341 (or 35336 counting only the distinct ones).

The product of its digits is 53343360, while the sum is 63.

The spelling of 213727687956 in words is "two hundred thirteen billion, seven hundred twenty-seven million, six hundred eighty-seven thousand, nine hundred fifty-six".