205470515 has 4 divisors (see below), whose sum is σ = 246564624. Its totient is φ = 164376408.

The previous prime is 205470497. The next prime is 205470527. The reversal of 205470515 is 515074502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 515074502 = 2 ⋅257537251.

It is a cyclic number.

It is not a de Polignac number, because 205470515 - 2¹⁴ = 205454131 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20547047 + ... + 20547056.

It is an arithmetic number, because the mean of its divisors is an integer number (61641156).

Almost surely, 2^205470515 is an apocalyptic number.

205470515 is a deficient number, since it is larger than the sum of its proper divisors (41094109).

205470515 is an equidigital number, since it uses as much as digits as its factorization.

205470515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41094108.

The product of its (nonzero) digits is 7000, while the sum is 29.

The square root of 205470515 is about 14334.2427424681. The cubic root of 205470515 is about 590.0876198512.

The spelling of 205470515 in words is "two hundred five million, four hundred seventy thousand, five hundred fifteen".