212931049 has 2 divisors, whose sum is σ = 212931050. Its totient is φ = 212931048.

The previous prime is 212931023. The next prime is 212931071. The reversal of 212931049 is 940139212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 195021225 + 17909824 = 13965^2 + 4232^2 .

It is a cyclic number.

It is not a de Polignac number, because 212931049 - 2¹¹ = 212929001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212931049.

It is not a weakly prime, because it can be changed into another prime (212931349) 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, 106465524 + 106465525.

It is an arithmetic number, because the mean of its divisors is an integer number (106465525).

Almost surely, 2^212931049 is an apocalyptic number.

It is an amenable number.

212931049 is a deficient number, since it is larger than the sum of its proper divisors (1).

212931049 is an equidigital number, since it uses as much as digits as its factorization.

212931049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 212931049 is about 14592.1571057880. The cubic root of 212931049 is about 597.1448134381.

The spelling of 212931049 in words is "two hundred twelve million, nine hundred thirty-one thousand, forty-nine".