213151249 has 2 divisors, whose sum is σ = 213151250. Its totient is φ = 213151248.

The previous prime is 213151241. The next prime is 213151271. The reversal of 213151249 is 942151312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 204490000 + 8661249 = 14300^2 + 2943^2 .

It is a cyclic number.

It is not a de Polignac number, because 213151249 - 2³ = 213151241 is a prime.

It is not a weakly prime, because it can be changed into another prime (213151241) 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, 106575624 + 106575625.

It is an arithmetic number, because the mean of its divisors is an integer number (106575625).

Almost surely, 2^213151249 is an apocalyptic number.

It is an amenable number.

213151249 is a deficient number, since it is larger than the sum of its proper divisors (1).

213151249 is an equidigital number, since it uses as much as digits as its factorization.

213151249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 28.

The square root of 213151249 is about 14599.7003051433. The cubic root of 213151249 is about 597.3505858198.

The spelling of 213151249 in words is "two hundred thirteen million, one hundred fifty-one thousand, two hundred forty-nine".