211772023 has 2 divisors, whose sum is σ = 211772024. Its totient is φ = 211772022.

The previous prime is 211771993. The next prime is 211772027. The reversal of 211772023 is 320277112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211772023 - 2¹³ = 211763831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211772027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105886011 + 105886012.

It is an arithmetic number, because the mean of its divisors is an integer number (105886012).

Almost surely, 2^211772023 is an apocalyptic number.

211772023 is a deficient number, since it is larger than the sum of its proper divisors (1).

211772023 is an equidigital number, since it uses as much as digits as its factorization.

211772023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 211772023 is about 14552.3889104160. The cubic root of 211772023 is about 596.0593823616.

The spelling of 211772023 in words is "two hundred eleven million, seven hundred seventy-two thousand, twenty-three".