205056415 has 4 divisors (see below), whose sum is σ = 246067704. Its totient is φ = 164045128.

The previous prime is 205056409. The next prime is 205056433. The reversal of 205056415 is 514650502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 205056415 - 2¹⁹ = 204532127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20505637 + ... + 20505646.

It is an arithmetic number, because the mean of its divisors is an integer number (61516926).

Almost surely, 2^205056415 is an apocalyptic number.

205056415 is a deficient number, since it is larger than the sum of its proper divisors (41011289).

205056415 is an equidigital number, since it uses as much as digits as its factorization.

205056415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41011288.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 205056415 is about 14319.7910250115. The cubic root of 205056415 is about 589.6909374315.

The spelling of 205056415 in words is "two hundred five million, fifty-six thousand, four hundred fifteen".