210131205 has 16 divisors (see below), whose sum is σ = 338779584. Its totient is φ = 111213440.

The previous prime is 210131189. The next prime is 210131221. The reversal of 210131205 is 502131012.

It is an interprime number because it is at equal distance from previous prime (210131189) and next prime (210131221).

It is not a de Polignac number, because 210131205 - 2⁴ = 210131189 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51504 + ... + 55433.

It is an arithmetic number, because the mean of its divisors is an integer number (21173724).

Almost surely, 2^210131205 is an apocalyptic number.

It is an amenable number.

210131205 is a deficient number, since it is larger than the sum of its proper divisors (128648379).

210131205 is a wasteful number, since it uses less digits than its factorization.

210131205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107076.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 210131205 is about 14495.9030418943. The cubic root of 210131205 is about 594.5159587554.

Adding to 210131205 its reverse (502131012), we get a palindrome (712262217).

The spelling of 210131205 in words is "two hundred ten million, one hundred thirty-one thousand, two hundred five".