205198131 has 8 divisors (see below), whose sum is σ = 273723840. Its totient is φ = 136735592.

The previous prime is 205198121. The next prime is 205198187. The reversal of 205198131 is 131891502.

205198131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 205198131 - 2²² = 201003827 is a prime.

It is a super-2 number, since 2×205198131² = 84212545931786322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (205198121) 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, 7605 + ... + 21638.

It is an arithmetic number, because the mean of its divisors is an integer number (34215480).

Almost surely, 2^205198131 is an apocalyptic number.

205198131 is a deficient number, since it is larger than the sum of its proper divisors (68525709).

205198131 is a wasteful number, since it uses less digits than its factorization.

205198131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31585.

The product of its (nonzero) digits is 2160, while the sum is 30.

The square root of 205198131 is about 14324.7384269312. The cubic root of 205198131 is about 589.8267527332.

The spelling of 205198131 in words is "two hundred five million, one hundred ninety-eight thousand, one hundred thirty-one".