212261149 has 2 divisors, whose sum is σ = 212261150. Its totient is φ = 212261148.

The previous prime is 212261113. The next prime is 212261171. The reversal of 212261149 is 941162212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 186322500 + 25938649 = 13650^2 + 5093^2 .

It is a cyclic number.

It is not a de Polignac number, because 212261149 - 2¹¹ = 212259101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212261849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106130574 + 106130575.

It is an arithmetic number, because the mean of its divisors is an integer number (106130575).

Almost surely, 2^212261149 is an apocalyptic number.

It is an amenable number.

212261149 is a deficient number, since it is larger than the sum of its proper divisors (1).

212261149 is an equidigital number, since it uses as much as digits as its factorization.

212261149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 28.

The square root of 212261149 is about 14569.1849119983. The cubic root of 212261149 is about 596.5179320223.

The spelling of 212261149 in words is "two hundred twelve million, two hundred sixty-one thousand, one hundred forty-nine".