205370505 has 48 divisors (see below), whose sum is σ = 377498880. Its totient is φ = 105930720.

The previous prime is 205370491. The next prime is 205370507. The reversal of 205370505 is 505073502.

205370505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 205370505 - 2⁶ = 205370441 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (205370507) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 128944 + ... + 130526.

It is an arithmetic number, because the mean of its divisors is an integer number (7864560).

Almost surely, 2^205370505 is an apocalyptic number.

It is an amenable number.

205370505 is a deficient number, since it is larger than the sum of its proper divisors (172128375).

205370505 is a wasteful number, since it uses less digits than its factorization.

205370505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1659 (or 1622 counting only the distinct ones).

The product of its (nonzero) digits is 5250, while the sum is 27.

The square root of 205370505 is about 14330.7538182749. The cubic root of 205370505 is about 589.9918652522.

The spelling of 205370505 in words is "two hundred five million, three hundred seventy thousand, five hundred five".