211231049 has 2 divisors, whose sum is σ = 211231050. Its totient is φ = 211231048.

The previous prime is 211230997. The next prime is 211231051. The reversal of 211231049 is 940132112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206123449 + 5107600 = 14357^2 + 2260^2 .

It is a cyclic number.

It is not a de Polignac number, because 211231049 - 2⁸ = 211230793 is a prime.

Together with 211231051, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (211231079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105615524 + 105615525.

It is an arithmetic number, because the mean of its divisors is an integer number (105615525).

Almost surely, 2^211231049 is an apocalyptic number.

It is an amenable number.

211231049 is a deficient number, since it is larger than the sum of its proper divisors (1).

211231049 is an equidigital number, since it uses as much as digits as its factorization.

211231049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 211231049 is about 14533.7899049078. The cubic root of 211231049 is about 595.5514027841.

The spelling of 211231049 in words is "two hundred eleven million, two hundred thirty-one thousand, forty-nine".