206321190 has 32 divisors (see below), whose sum is σ = 521233920. Its totient is φ = 52123104.

The previous prime is 206321189. The next prime is 206321191. The reversal of 206321190 is 91123602.

It is an interprime number because it is at equal distance from previous prime (206321189) and next prime (206321191).

It is a super-2 number, since 2×206321190² = 85136866886032200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 206321190.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206321191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180414 + ... + 181553.

It is an arithmetic number, because the mean of its divisors is an integer number (16288560).

Almost surely, 2^206321190 is an apocalyptic number.

206321190 is an abundant number, since it is smaller than the sum of its proper divisors (314912730).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

206321190 is a wasteful number, since it uses less digits than its factorization.

206321190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361996.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 206321190 is about 14363.8849201739. The cubic root of 206321190 is about 590.9008454220.

Adding to 206321190 its reverse (91123602), we get a palindrome (297444792).

The spelling of 206321190 in words is "two hundred six million, three hundred twenty-one thousand, one hundred ninety".