205438135 has 32 divisors (see below), whose sum is σ = 290534400. Its totient is φ = 139384224.

The previous prime is 205438073. The next prime is 205438151. The reversal of 205438135 is 531834502.

It is not a de Polignac number, because 205438135 - 2⁹ = 205437623 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 205438097 and 205438106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 176064 + ... + 177226.

It is an arithmetic number, because the mean of its divisors is an integer number (9079200).

Almost surely, 2^205438135 is an apocalyptic number.

205438135 is a deficient number, since it is larger than the sum of its proper divisors (85096265).

205438135 is a wasteful number, since it uses less digits than its factorization.

205438135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1292 (or 1278 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 205438135 is about 14333.1132347442. The cubic root of 205438135 is about 590.0566210144.

The spelling of 205438135 in words is "two hundred five million, four hundred thirty-eight thousand, one hundred thirty-five".