206417057 has 16 divisors (see below), whose sum is σ = 262608000. Its totient is φ = 160841520.

The previous prime is 206417053. The next prime is 206417069. The reversal of 206417057 is 750714602.

It is not a de Polignac number, because 206417057 - 2² = 206417053 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206417053) 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 15 ways as a sum of consecutive naturals, for example, 23582 + ... + 31127.

It is an arithmetic number, because the mean of its divisors is an integer number (16413000).

Almost surely, 2^206417057 is an apocalyptic number.

It is an amenable number.

206417057 is a deficient number, since it is larger than the sum of its proper divisors (56190943).

206417057 is an equidigital number, since it uses as much as digits as its factorization.

206417057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54741 (or 54727 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 206417057 is about 14367.2216172787. The cubic root of 206417057 is about 590.9923518087.

The spelling of 206417057 in words is "two hundred six million, four hundred seventeen thousand, fifty-seven".