205513071 has 8 divisors (see below), whose sum is σ = 275395200. Its totient is φ = 136319832.

The previous prime is 205513067. The next prime is 205513079. The reversal of 205513071 is 170315502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 205513071 - 2² = 205513067 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205513079) 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, 171525 + ... + 172718.

It is an arithmetic number, because the mean of its divisors is an integer number (34424400).

Almost surely, 2^205513071 is an apocalyptic number.

205513071 is a deficient number, since it is larger than the sum of its proper divisors (69882129).

205513071 is a wasteful number, since it uses less digits than its factorization.

205513071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344445.

The product of its (nonzero) digits is 1050, while the sum is 24.

The square root of 205513071 is about 14335.7270830607. The cubic root of 205513071 is about 590.1283556802.

Adding to 205513071 its reverse (170315502), we get a palindrome (375828573).

The spelling of 205513071 in words is "two hundred five million, five hundred thirteen thousand, seventy-one".