211999182469 has 2 divisors, whose sum is σ = 211999182470. Its totient is φ = 211999182468.

The previous prime is 211999182443. The next prime is 211999182487. The reversal of 211999182469 is 964281999112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131541859969 + 80457322500 = 362687^2 + 283650^2 .

It is a cyclic number.

It is not a de Polignac number, because 211999182469 - 2²⁷ = 211864964741 is a prime.

It is a super-2 number, since 2×211999182469² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211999582469) 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, 105999591234 + 105999591235.

It is an arithmetic number, because the mean of its divisors is an integer number (105999591235).

Almost surely, 2^211999182469 is an apocalyptic number.

It is an amenable number.

211999182469 is a deficient number, since it is larger than the sum of its proper divisors (1).

211999182469 is an equidigital number, since it uses as much as digits as its factorization.

211999182469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5038848, while the sum is 61.

The spelling of 211999182469 in words is "two hundred eleven billion, nine hundred ninety-nine million, one hundred eighty-two thousand, four hundred sixty-nine".