212424323257 has 2 divisors, whose sum is σ = 212424323258. Its totient is φ = 212424323256.

The previous prime is 212424323183. The next prime is 212424323273. The reversal of 212424323257 is 752323424212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139180478761 + 73243844496 = 373069^2 + 270636^2 .

It is a cyclic number.

It is not a de Polignac number, because 212424323257 - 2¹¹ = 212424321209 is a prime.

It is a super-2 number, since 2×212424323257² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (212424323357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106212161628 + 106212161629.

It is an arithmetic number, because the mean of its divisors is an integer number (106212161629).

Almost surely, 2^212424323257 is an apocalyptic number.

It is an amenable number.

212424323257 is a deficient number, since it is larger than the sum of its proper divisors (1).

212424323257 is an equidigital number, since it uses as much as digits as its factorization.

212424323257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 37.

Adding to 212424323257 its reverse (752323424212), we get a palindrome (964747747469).

The spelling of 212424323257 in words is "two hundred twelve billion, four hundred twenty-four million, three hundred twenty-three thousand, two hundred fifty-seven".