213157726687 has 2 divisors, whose sum is σ = 213157726688. Its totient is φ = 213157726686.

The previous prime is 213157726657. The next prime is 213157726697. The reversal of 213157726687 is 786627751312.

213157726687 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213157726687 - 2⁷ = 213157726559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213157726657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106578863343 + 106578863344.

It is an arithmetic number, because the mean of its divisors is an integer number (106578863344).

Almost surely, 2^213157726687 is an apocalyptic number.

213157726687 is a deficient number, since it is larger than the sum of its proper divisors (1).

213157726687 is an equidigital number, since it uses as much as digits as its factorization.

213157726687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5927040, while the sum is 55.

The spelling of 213157726687 in words is "two hundred thirteen billion, one hundred fifty-seven million, seven hundred twenty-six thousand, six hundred eighty-seven".