212264281 has 2 divisors, whose sum is σ = 212264282. Its totient is φ = 212264280.

The previous prime is 212264251. The next prime is 212264287. The reversal of 212264281 is 182462212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210714256 + 1550025 = 14516^2 + 1245^2 .

It is a cyclic number.

It is not a de Polignac number, because 212264281 - 2⁵ = 212264249 is a prime.

It is a super-2 number, since 2×212264281² = 90112249976893922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (212264287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106132140 + 106132141.

It is an arithmetic number, because the mean of its divisors is an integer number (106132141).

Almost surely, 2^212264281 is an apocalyptic number.

It is an amenable number.

212264281 is a deficient number, since it is larger than the sum of its proper divisors (1).

212264281 is an equidigital number, since it uses as much as digits as its factorization.

212264281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3072, while the sum is 28.

The square root of 212264281 is about 14569.2923987406. The cubic root of 212264281 is about 596.5208659631.

The spelling of 212264281 in words is "two hundred twelve million, two hundred sixty-four thousand, two hundred eighty-one".