213690751771 has 4 divisors (see below), whose sum is σ = 244218002032. Its totient is φ = 183163501512.

The previous prime is 213690751759. The next prime is 213690751783. The reversal of 213690751771 is 177157096312.

213690751771 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (213690751759) and next prime (213690751783).

It is a cyclic number.

It is not a de Polignac number, because 213690751771 - 2³³ = 205100817179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213690751171) 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 in 3 ways as a sum of consecutive naturals, for example, 15263625120 + ... + 15263625133.

It is an arithmetic number, because the mean of its divisors is an integer number (61054500508).

Almost surely, 2^213690751771 is an apocalyptic number.

213690751771 is a deficient number, since it is larger than the sum of its proper divisors (30527250261).

213690751771 is an equidigital number, since it uses as much as digits as its factorization.

213690751771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30527250260.

The product of its (nonzero) digits is 555660, while the sum is 49.

The spelling of 213690751771 in words is "two hundred thirteen billion, six hundred ninety million, seven hundred fifty-one thousand, seven hundred seventy-one".