205109822 has 4 divisors (see below), whose sum is σ = 307664736. Its totient is φ = 102554910.

The previous prime is 205109813. The next prime is 205109843. The reversal of 205109822 is 228901502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 228901502 = 2 ⋅114450751.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51277454 + ... + 51277457.

It is an arithmetic number, because the mean of its divisors is an integer number (76916184).

Almost surely, 2^205109822 is an apocalyptic number.

205109822 is a deficient number, since it is larger than the sum of its proper divisors (102554914).

205109822 is a wasteful number, since it uses less digits than its factorization.

205109822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102554913.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 205109822 is about 14321.6557003721. The cubic root of 205109822 is about 589.7421280435.

The spelling of 205109822 in words is "two hundred five million, one hundred nine thousand, eight hundred twenty-two".