205113015 has 24 divisors (see below), whose sum is σ = 365141088. Its totient is φ = 106436160.

The previous prime is 205112989. The next prime is 205113031. The reversal of 205113015 is 510311502.

It is not a de Polignac number, because 205113015 - 2⁵ = 205112983 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59931 + ... + 63260.

It is an arithmetic number, because the mean of its divisors is an integer number (15214212).

Almost surely, 2^205113015 is an apocalyptic number.

205113015 is a deficient number, since it is larger than the sum of its proper divisors (160028073).

205113015 is a wasteful number, since it uses less digits than its factorization.

205113015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123239 (or 123236 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 205113015 is about 14321.7671744796. The cubic root of 205113015 is about 589.7451882526.

Adding to 205113015 its reverse (510311502), we get a palindrome (715424517).

The spelling of 205113015 in words is "two hundred five million, one hundred thirteen thousand, fifteen".