205122415 has 8 divisors (see below), whose sum is σ = 248584608. Its totient is φ = 162472800.

The previous prime is 205122397. The next prime is 205122431. The reversal of 205122415 is 514221502.

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

It is not a de Polignac number, because 205122415 - 2⁵ = 205122383 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 7 ways as a sum of consecutive naturals, for example, 202587 + ... + 203596.

It is an arithmetic number, because the mean of its divisors is an integer number (31073076).

Almost surely, 2^205122415 is an apocalyptic number.

205122415 is a deficient number, since it is larger than the sum of its proper divisors (43462193).

205122415 is a wasteful number, since it uses less digits than its factorization.

205122415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406289.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 205122415 is about 14322.0953425119. The cubic root of 205122415 is about 589.7541971398.

Adding to 205122415 its reverse (514221502), we get a palindrome (719343917).

The spelling of 205122415 in words is "two hundred five million, one hundred twenty-two thousand, four hundred fifteen".