213158721851 has 8 divisors (see below), whose sum is σ = 215893324800. Its totient is φ = 210425028840.

The previous prime is 213158721829. The next prime is 213158721857. The reversal of 213158721851 is 158127851312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 213158721851 - 2¹⁴ = 213158705467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213158721857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250430 + ... + 699308.

It is an arithmetic number, because the mean of its divisors is an integer number (26986665600).

Almost surely, 2^213158721851 is an apocalyptic number.

213158721851 is a deficient number, since it is larger than the sum of its proper divisors (2734602949).

213158721851 is an equidigital number, since it uses as much as digits as its factorization.

213158721851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454969.

The product of its digits is 134400, while the sum is 44.

The spelling of 213158721851 in words is "two hundred thirteen billion, one hundred fifty-eight million, seven hundred twenty-one thousand, eight hundred fifty-one".