213271687 has 2 divisors, whose sum is σ = 213271688. Its totient is φ = 213271686.

The previous prime is 213271673. The next prime is 213271691. The reversal of 213271687 is 786172312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213271687 - 2⁷ = 213271559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213271187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106635843 + 106635844.

It is an arithmetic number, because the mean of its divisors is an integer number (106635844).

Almost surely, 2^213271687 is an apocalyptic number.

213271687 is a deficient number, since it is larger than the sum of its proper divisors (1).

213271687 is an equidigital number, since it uses as much as digits as its factorization.

213271687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 37.

The square root of 213271687 is about 14603.8243963696. The cubic root of 213271687 is about 597.4630727107.

The spelling of 213271687 in words is "two hundred thirteen million, two hundred seventy-one thousand, six hundred eighty-seven".