212206031 has 2 divisors, whose sum is σ = 212206032. Its totient is φ = 212206030.

The previous prime is 212205997. The next prime is 212206069. The reversal of 212206031 is 130602212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212206031 - 2¹⁴ = 212189647 is a prime.

It is a super-2 number, since 2×212206031² = 90062799185545922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212206331) 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, 106103015 + 106103016.

It is an arithmetic number, because the mean of its divisors is an integer number (106103016).

Almost surely, 2^212206031 is an apocalyptic number.

212206031 is a deficient number, since it is larger than the sum of its proper divisors (1).

212206031 is an equidigital number, since it uses as much as digits as its factorization.

212206031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 212206031 is about 14567.2931940014. The cubic root of 212206031 is about 596.4662948105.

Adding to 212206031 its reverse (130602212), we get a palindrome (342808243).

The spelling of 212206031 in words is "two hundred twelve million, two hundred six thousand, thirty-one".