210013309 has 8 divisors (see below), whose sum is σ = 232525728. Its totient is φ = 188070960.

The previous prime is 210013283. The next prime is 210013337. The reversal of 210013309 is 903310012.

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

It is not a de Polignac number, because 210013309 - 2⁹ = 210012797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210013339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141742 + ... + 143215.

It is an arithmetic number, because the mean of its divisors is an integer number (29065716).

Almost surely, 2^210013309 is an apocalyptic number.

It is an amenable number.

210013309 is a deficient number, since it is larger than the sum of its proper divisors (22512419).

210013309 is a wasteful number, since it uses less digits than its factorization.

210013309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285035.

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 210013309 is about 14491.8359430405. The cubic root of 210013309 is about 594.4047517821.

It can be divided in two parts, 21001 and 3309, that added together give a triangular number (24310 = T₂₂₀).

The spelling of 210013309 in words is "two hundred ten million, thirteen thousand, three hundred nine".