205470705 has 48 divisors (see below), whose sum is σ = 366186240. Its totient is φ = 98292480.

The previous prime is 205470689. The next prime is 205470737. The reversal of 205470705 is 507074502.

It is not a de Polignac number, because 205470705 - 2⁴ = 205470689 is a prime.

It is a super-2 number, since 2×205470705² = 84436421226394050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 142669 + ... + 144101.

It is an arithmetic number, because the mean of its divisors is an integer number (7628880).

Almost surely, 2^205470705 is an apocalyptic number.

It is an amenable number.

205470705 is a deficient number, since it is larger than the sum of its proper divisors (160715535).

205470705 is a wasteful number, since it uses less digits than its factorization.

205470705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1542 (or 1531 counting only the distinct ones).

The product of its (nonzero) digits is 9800, while the sum is 30.

The square root of 205470705 is about 14334.2493699531. The cubic root of 205470705 is about 590.0878017372.

The spelling of 205470705 in words is "two hundred five million, four hundred seventy thousand, seven hundred five".