205641538 has 8 divisors (see below), whose sum is σ = 318412800. Its totient is φ = 99503940.

The previous prime is 205641517. The next prime is 205641563. The reversal of 205641538 is 835146502.

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

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, 1658338 + ... + 1658461.

It is an arithmetic number, because the mean of its divisors is an integer number (39801600).

Almost surely, 2^205641538 is an apocalyptic number.

205641538 is a deficient number, since it is larger than the sum of its proper divisors (112771262).

205641538 is a wasteful number, since it uses less digits than its factorization.

205641538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3316832.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 205641538 is about 14340.2070417411. The cubic root of 205641538 is about 590.2512938917.

The spelling of 205641538 in words is "two hundred five million, six hundred forty-one thousand, five hundred thirty-eight".