1233213257 has 2 divisors, whose sum is σ = 1233213258. Its totient is φ = 1233213256.

The previous prime is 1233213239. The next prime is 1233213277. The reversal of 1233213257 is 7523123321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 812307001 + 420906256 = 28501^2 + 20516^2 .

It is a cyclic number.

It is not a de Polignac number, because 1233213257 - 2⁶ = 1233213193 is a prime.

It is not a weakly prime, because it can be changed into another prime (1233213277) 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, 616606628 + 616606629.

It is an arithmetic number, because the mean of its divisors is an integer number (616606629).

Almost surely, 2^1233213257 is an apocalyptic number.

It is an amenable number.

1233213257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1233213257 is an equidigital number, since it uses as much as digits as its factorization.

1233213257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 29.

The square root of 1233213257 is about 35117.1362300516. The cubic root of 1233213257 is about 1072.3734709088.

Adding to 1233213257 its reverse (7523123321), we get a palindrome (8756336578).

The spelling of 1233213257 in words is "one billion, two hundred thirty-three million, two hundred thirteen thousand, two hundred fifty-seven".