212431357 has 2 divisors, whose sum is σ = 212431358. Its totient is φ = 212431356.

The previous prime is 212431327. The next prime is 212431363. The reversal of 212431357 is 753134212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 192127321 + 20304036 = 13861^2 + 4506^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212431357 is a prime.

It is a super-2 number, since 2×212431357² = 90254162873722898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212431327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106215678 + 106215679.

It is an arithmetic number, because the mean of its divisors is an integer number (106215679).

Almost surely, 2^212431357 is an apocalyptic number.

It is an amenable number.

212431357 is a deficient number, since it is larger than the sum of its proper divisors (1).

212431357 is an equidigital number, since it uses as much as digits as its factorization.

212431357 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5040, while the sum is 28.

The square root of 212431357 is about 14575.0251114706. The cubic root of 212431357 is about 596.6773347170.

Adding to 212431357 its reverse (753134212), we get a palindrome (965565569).

The spelling of 212431357 in words is "two hundred twelve million, four hundred thirty-one thousand, three hundred fifty-seven".