212422649 has 2 divisors, whose sum is σ = 212422650. Its totient is φ = 212422648.

The previous prime is 212422601. The next prime is 212422663. The reversal of 212422649 is 946224212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199713424 + 12709225 = 14132^2 + 3565^2 .

It is a cyclic number.

It is not a de Polignac number, because 212422649 - 2¹⁶ = 212357113 is a prime.

It is not a weakly prime, because it can be changed into another prime (212428649) 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, 106211324 + 106211325.

It is an arithmetic number, because the mean of its divisors is an integer number (106211325).

Almost surely, 2^212422649 is an apocalyptic number.

It is an amenable number.

212422649 is a deficient number, since it is larger than the sum of its proper divisors (1).

212422649 is an equidigital number, since it uses as much as digits as its factorization.

212422649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 32.

The square root of 212422649 is about 14574.7263782206. The cubic root of 212422649 is about 596.6691815935.

The spelling of 212422649 in words is "two hundred twelve million, four hundred twenty-two thousand, six hundred forty-nine".