205231319 has 4 divisors (see below), whose sum is σ = 205260120. Its totient is φ = 205202520.

The previous prime is 205231309. The next prime is 205231337. The reversal of 205231319 is 913132502.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 913132502 = 2 ⋅456566251.

It is a cyclic number.

It is not a de Polignac number, because 205231319 - 2¹⁶ = 205165783 is a prime.

It is a super-2 number, since 2×205231319² = 84239788596959522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205231309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5012 + ... + 20870.

It is an arithmetic number, because the mean of its divisors is an integer number (51315030).

Almost surely, 2^205231319 is an apocalyptic number.

205231319 is a deficient number, since it is larger than the sum of its proper divisors (28801).

205231319 is a wasteful number, since it uses less digits than its factorization.

205231319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28800.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 205231319 is about 14325.8967956634. The cubic root of 205231319 is about 589.8585498309.

The spelling of 205231319 in words is "two hundred five million, two hundred thirty-one thousand, three hundred nineteen".