205315335015 has 16 divisors (see below), whose sum is σ = 375433755648. Its totient is φ = 93858438816.

The previous prime is 205315335007. The next prime is 205315335079. The reversal of 205315335015 is 510533513502.

It is a happy number.

It is not a de Polignac number, because 205315335015 - 2³ = 205315335007 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 977691967 + ... + 977692176.

It is an arithmetic number, because the mean of its divisors is an integer number (23464609728).

Almost surely, 2^205315335015 is an apocalyptic number.

205315335015 is a deficient number, since it is larger than the sum of its proper divisors (170118420633).

205315335015 is a wasteful number, since it uses less digits than its factorization.

205315335015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1955384158.

The product of its (nonzero) digits is 33750, while the sum is 33.

Adding to 205315335015 its reverse (510533513502), we get a palindrome (715848848517).

The spelling of 205315335015 in words is "two hundred five billion, three hundred fifteen million, three hundred thirty-five thousand, fifteen".