213002857 has 2 divisors, whose sum is σ = 213002858. Its totient is φ = 213002856.

The previous prime is 213002851. The next prime is 213002861. The reversal of 213002857 is 758200312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 211877136 + 1125721 = 14556^2 + 1061^2 .

It is a cyclic number.

It is not a de Polignac number, because 213002857 - 2⁷ = 213002729 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (213002851) 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 as a sum of consecutive naturals, namely, 106501428 + 106501429.

It is an arithmetic number, because the mean of its divisors is an integer number (106501429).

Almost surely, 2^213002857 is an apocalyptic number.

It is an amenable number.

213002857 is a deficient number, since it is larger than the sum of its proper divisors (1).

213002857 is an equidigital number, since it uses as much as digits as its factorization.

213002857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 213002857 is about 14594.6173982054. The cubic root of 213002857 is about 597.2119321223.

The spelling of 213002857 in words is "two hundred thirteen million, two thousand, eight hundred fifty-seven".