205231994 has 16 divisors (see below), whose sum is σ = 336056256. Its totient is φ = 93225600.

The previous prime is 205231993. The next prime is 205232009. The reversal of 205231994 is 499132502.

It is a super-2 number, since 2×205231994² = 84240342722432072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (205231993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56699 + ... + 60209.

It is an arithmetic number, because the mean of its divisors is an integer number (21003516).

Almost surely, 2^205231994 is an apocalyptic number.

205231994 is a deficient number, since it is larger than the sum of its proper divisors (130824262).

205231994 is a wasteful number, since it uses less digits than its factorization.

205231994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6181.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 205231994 is about 14325.9203543786. The cubic root of 205231994 is about 589.8591965062.

The spelling of 205231994 in words is "two hundred five million, two hundred thirty-one thousand, nine hundred ninety-four".