213344657 has 2 divisors, whose sum is σ = 213344658. Its totient is φ = 213344656.

The previous prime is 213344653. The next prime is 213344687. The reversal of 213344657 is 756443312.

213344657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 167159041 + 46185616 = 12929^2 + 6796^2 .

It is a cyclic number.

It is not a de Polignac number, because 213344657 - 2² = 213344653 is a prime.

It is not a weakly prime, because it can be changed into another prime (213344653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106672328 + 106672329.

It is an arithmetic number, because the mean of its divisors is an integer number (106672329).

Almost surely, 2^213344657 is an apocalyptic number.

It is an amenable number.

213344657 is a deficient number, since it is larger than the sum of its proper divisors (1).

213344657 is an equidigital number, since it uses as much as digits as its factorization.

213344657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 35.

The square root of 213344657 is about 14606.3225008898. The cubic root of 213344657 is about 597.5312047567.

Adding to 213344657 its reverse (756443312), we get a palindrome (969787969).

The spelling of 213344657 in words is "two hundred thirteen million, three hundred forty-four thousand, six hundred fifty-seven".