213344556687 has 6 divisors (see below), whose sum is σ = 308164359672. Its totient is φ = 142229704452.

The previous prime is 213344556683. The next prime is 213344556703. The reversal of 213344556687 is 786655443312.

213344556687 is a `hidden beast` number, since 2 + 1 + 3 + 3 + 4 + 4 + 556 + 6 + 87 = 666.

It is not a de Polignac number, because 213344556687 - 2² = 213344556683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213344556683) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11852475363 + ... + 11852475380.

It is an arithmetic number, because the mean of its divisors is an integer number (51360726612).

Almost surely, 2^213344556687 is an apocalyptic number.

213344556687 is a deficient number, since it is larger than the sum of its proper divisors (94819802985).

213344556687 is a wasteful number, since it uses less digits than its factorization.

213344556687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23704950749 (or 23704950746 counting only the distinct ones).

The product of its digits is 14515200, while the sum is 54.

Adding to 213344556687 its reverse (786655443312), we get a palindrome (999999999999).

The spelling of 213344556687 in words is "two hundred thirteen billion, three hundred forty-four million, five hundred fifty-six thousand, six hundred eighty-seven".