205122315 has 16 divisors (see below), whose sum is σ = 332352000. Its totient is φ = 108013152.

The previous prime is 205122293. The next prime is 205122329. The reversal of 205122315 is 513221502.

It is not a de Polignac number, because 205122315 - 2⁵ = 205122283 is a prime.

It is a super-2 number, since 2×205122315² = 84150328221918450, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 205122291 and 205122300.

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, 85365 + ... + 87734.

It is an arithmetic number, because the mean of its divisors is an integer number (20772000).

Almost surely, 2^205122315 is an apocalyptic number.

205122315 is a deficient number, since it is larger than the sum of its proper divisors (127229685).

205122315 is a wasteful number, since it uses less digits than its factorization.

205122315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173186.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 205122315 is about 14322.0918514022. The cubic root of 205122315 is about 589.7541013021.

Adding to 205122315 its reverse (513221502), we get a palindrome (718343817).

The spelling of 205122315 in words is "two hundred five million, one hundred twenty-two thousand, three hundred fifteen".