213810421609 has 16 divisors (see below), whose sum is σ = 219822609600. Its totient is φ = 207884771136.

The previous prime is 213810421549. The next prime is 213810421633. The reversal of 213810421609 is 906124018312.

It is a cyclic number.

It is not a de Polignac number, because 213810421609 - 2⁷ = 213810421481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213810421639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3591127 + ... + 3650179.

It is an arithmetic number, because the mean of its divisors is an integer number (13738913100).

Almost surely, 2^213810421609 is an apocalyptic number.

It is an amenable number.

213810421609 is a deficient number, since it is larger than the sum of its proper divisors (6012187991).

213810421609 is a wasteful number, since it uses less digits than its factorization.

213810421609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59784.

The product of its (nonzero) digits is 20736, while the sum is 37.

The spelling of 213810421609 in words is "two hundred thirteen billion, eight hundred ten million, four hundred twenty-one thousand, six hundred nine".