205313493 has 32 divisors (see below), whose sum is σ = 342623232. Its totient is φ = 106243200.

The previous prime is 205313491. The next prime is 205313497. The reversal of 205313493 is 394313502.

It is not a de Polignac number, because 205313493 - 2¹ = 205313491 is a prime.

It is a super-2 number, since 2×205313493² = 84307260815722098, 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 205313493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205313491) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63330 + ... + 66492.

It is an arithmetic number, because the mean of its divisors is an integer number (10706976).

Almost surely, 2^205313493 is an apocalyptic number.

It is an amenable number.

205313493 is a deficient number, since it is larger than the sum of its proper divisors (137309739).

205313493 is a wasteful number, since it uses less digits than its factorization.

205313493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3465.

The product of its (nonzero) digits is 9720, while the sum is 30.

The square root of 205313493 is about 14328.7645315289. The cubic root of 205313493 is about 589.9372651864.

Adding to 205313493 its reverse (394313502), we get a palindrome (599626995).

The spelling of 205313493 in words is "two hundred five million, three hundred thirteen thousand, four hundred ninety-three".