205140867 has 8 divisors (see below), whose sum is σ = 282953040. Its totient is φ = 132044640.

The previous prime is 205140847. The next prime is 205140883. The reversal of 205140867 is 768041502.

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

It is a de Polignac number, because none of the positive numbers 2^k-205140867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (205140827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1178884 + ... + 1179057.

It is an arithmetic number, because the mean of its divisors is an integer number (35369130).

Almost surely, 2^205140867 is an apocalyptic number.

205140867 is a deficient number, since it is larger than the sum of its proper divisors (77812173).

205140867 is a wasteful number, since it uses less digits than its factorization.

205140867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2357973.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 205140867 is about 14322.7395075104. The cubic root of 205140867 is about 589.7718805935.

The spelling of 205140867 in words is "two hundred five million, one hundred forty thousand, eight hundred sixty-seven".