213450102809 has 4 divisors (see below), whose sum is σ = 213455675904. Its totient is φ = 213444529716.

The previous prime is 213450102769. The next prime is 213450102823. The reversal of 213450102809 is 908201054312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 213450102809 - 2²⁴ = 213433325593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213450102869) 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 3 ways as a sum of consecutive naturals, for example, 2728697 + ... + 2805830.

It is an arithmetic number, because the mean of its divisors is an integer number (53363918976).

Almost surely, 2^213450102809 is an apocalyptic number.

It is an amenable number.

213450102809 is a deficient number, since it is larger than the sum of its proper divisors (5573095).

213450102809 is an equidigital number, since it uses as much as digits as its factorization.

213450102809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5573094.

The product of its (nonzero) digits is 17280, while the sum is 35.

The spelling of 213450102809 in words is "two hundred thirteen billion, four hundred fifty million, one hundred two thousand, eight hundred nine".