212551049 has 2 divisors, whose sum is σ = 212551050. Its totient is φ = 212551048.

The previous prime is 212551039. The next prime is 212551057. The reversal of 212551049 is 940155212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 186131449 + 26419600 = 13643^2 + 5140^2 .

It is a cyclic number.

It is not a de Polignac number, because 212551049 - 2¹² = 212546953 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 (212551019) 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, 106275524 + 106275525.

It is an arithmetic number, because the mean of its divisors is an integer number (106275525).

Almost surely, 2^212551049 is an apocalyptic number.

It is an amenable number.

212551049 is a deficient number, since it is larger than the sum of its proper divisors (1).

212551049 is an equidigital number, since it uses as much as digits as its factorization.

212551049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 212551049 is about 14579.1305982216. The cubic root of 212551049 is about 596.7893773326.

The spelling of 212551049 in words is "two hundred twelve million, five hundred fifty-one thousand, forty-nine".