206572057 has 2 divisors, whose sum is σ = 206572058. Its totient is φ = 206572056.

The previous prime is 206572031. The next prime is 206572087. The reversal of 206572057 is 750275602.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110061081 + 96510976 = 10491^2 + 9824^2 .

It is a cyclic number.

It is not a de Polignac number, because 206572057 - 2⁷ = 206571929 is a prime.

It is a super-2 number, since 2×206572057² = 85344029466422498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (206572007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103286028 + 103286029.

It is an arithmetic number, because the mean of its divisors is an integer number (103286029).

Almost surely, 2^206572057 is an apocalyptic number.

It is an amenable number.

206572057 is a deficient number, since it is larger than the sum of its proper divisors (1).

206572057 is an equidigital number, since it uses as much as digits as its factorization.

206572057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29400, while the sum is 34.

The square root of 206572057 is about 14372.6148282071. The cubic root of 206572057 is about 591.1402415499.

The spelling of 206572057 in words is "two hundred six million, five hundred seventy-two thousand, fifty-seven".