209142203 has 8 divisors (see below), whose sum is σ = 212103168. Its totient is φ = 206202024.

The previous prime is 209142191. The next prime is 209142223. The reversal of 209142203 is 302241902.

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

It is a cyclic number.

It is not a de Polignac number, because 209142203 - 2¹² = 209138107 is a prime.

It is a super-2 number, since 2×209142203² = 87480922151386418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (209142223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15650 + ... + 25752.

It is an arithmetic number, because the mean of its divisors is an integer number (26512896).

Almost surely, 2^209142203 is an apocalyptic number.

209142203 is a deficient number, since it is larger than the sum of its proper divisors (2960965).

209142203 is a wasteful number, since it uses less digits than its factorization.

209142203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10393.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 209142203 is about 14461.7496520995. The cubic root of 209142203 is about 593.5817767862.

The spelling of 209142203 in words is "two hundred nine million, one hundred forty-two thousand, two hundred three".