213266257 has 2 divisors, whose sum is σ = 213266258. Its totient is φ = 213266256.

The previous prime is 213266243. The next prime is 213266299. The reversal of 213266257 is 752662312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 183846481 + 29419776 = 13559^2 + 5424^2 .

It is a cyclic number.

It is not a de Polignac number, because 213266257 - 2⁷ = 213266129 is a prime.

It is not a weakly prime, because it can be changed into another prime (213266227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106633128 + 106633129.

It is an arithmetic number, because the mean of its divisors is an integer number (106633129).

Almost surely, 2^213266257 is an apocalyptic number.

It is an amenable number.

213266257 is a deficient number, since it is larger than the sum of its proper divisors (1).

213266257 is an equidigital number, since it uses as much as digits as its factorization.

213266257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 34.

The square root of 213266257 is about 14603.6384849804. The cubic root of 213266257 is about 597.4580021017.

The spelling of 213266257 in words is "two hundred thirteen million, two hundred sixty-six thousand, two hundred fifty-seven".