213433851 has 4 divisors (see below), whose sum is σ = 284578472. Its totient is φ = 142289232.

The previous prime is 213433841. The next prime is 213433877. The reversal of 213433851 is 158334312.

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

It is not a de Polignac number, because 213433851 - 2¹⁰ = 213432827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213433841) 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, 35572306 + ... + 35572311.

It is an arithmetic number, because the mean of its divisors is an integer number (71144618).

Almost surely, 2^213433851 is an apocalyptic number.

213433851 is a deficient number, since it is larger than the sum of its proper divisors (71144621).

213433851 is an equidigital number, since it uses as much as digits as its factorization.

213433851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71144620.

The product of its digits is 8640, while the sum is 30.

The square root of 213433851 is about 14609.3754486631. The cubic root of 213433851 is about 597.6144640448.

The spelling of 213433851 in words is "two hundred thirteen million, four hundred thirty-three thousand, eight hundred fifty-one".