213306402309 has 144 divisors (see below), whose sum is σ = 393474009600. Its totient is φ = 100539204480.

The previous prime is 213306402299. The next prime is 213306402311. The reversal of 213306402309 is 903204603312.

It is not a de Polignac number, because 213306402309 - 2¹³ = 213306394117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a self number, because there is not a number n which added to its sum of digits gives 213306402309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213306402329) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 25332102 + ... + 25340520.

It is an arithmetic number, because the mean of its divisors is an integer number (2732458400).

Almost surely, 2^213306402309 is an apocalyptic number.

It is an amenable number.

213306402309 is a deficient number, since it is larger than the sum of its proper divisors (180167607291).

213306402309 is a wasteful number, since it uses less digits than its factorization.

213306402309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8536 (or 8512 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 33.

The spelling of 213306402309 in words is "two hundred thirteen billion, three hundred six million, four hundred two thousand, three hundred nine".