211251592249 has 2 divisors, whose sum is σ = 211251592250. Its totient is φ = 211251592248.

The previous prime is 211251592231. The next prime is 211251592273. The reversal of 211251592249 is 942295152112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125250164649 + 86001427600 = 353907^2 + 293260^2 .

It is a cyclic number.

It is not a de Polignac number, because 211251592249 - 2⁷ = 211251592121 is a prime.

It is not a weakly prime, because it can be changed into another prime (211251592049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105625796124 + 105625796125.

It is an arithmetic number, because the mean of its divisors is an integer number (105625796125).

Almost surely, 2^211251592249 is an apocalyptic number.

It is an amenable number.

211251592249 is a deficient number, since it is larger than the sum of its proper divisors (1).

211251592249 is an equidigital number, since it uses as much as digits as its factorization.

211251592249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129600, while the sum is 43.

The spelling of 211251592249 in words is "two hundred eleven billion, two hundred fifty-one million, five hundred ninety-two thousand, two hundred forty-nine".