212257361 has 2 divisors, whose sum is σ = 212257362. Its totient is φ = 212257360.

The previous prime is 212257343. The next prime is 212257373. The reversal of 212257361 is 163752212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 212255761 + 1600 = 14569^2 + 40^2 .

It is a cyclic number.

It is not a de Polignac number, because 212257361 - 2¹⁰ = 212256337 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (212257561) 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, 106128680 + 106128681.

It is an arithmetic number, because the mean of its divisors is an integer number (106128681).

Almost surely, 2^212257361 is an apocalyptic number.

It is an amenable number.

212257361 is a deficient number, since it is larger than the sum of its proper divisors (1).

212257361 is an equidigital number, since it uses as much as digits as its factorization.

212257361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5040, while the sum is 29.

The square root of 212257361 is about 14569.0549110092. The cubic root of 212257361 is about 596.5143835265.

The spelling of 212257361 in words is "two hundred twelve million, two hundred fifty-seven thousand, three hundred sixty-one".