211439983 has 2 divisors, whose sum is σ = 211439984. Its totient is φ = 211439982.

The previous prime is 211439971. The next prime is 211440023. The reversal of 211439983 is 389934112.

It is an a-pointer prime, because the next prime (211440023) can be obtained adding 211439983 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211439983 - 2²¹ = 209342831 is a prime.

It is a super-2 number, since 2×211439983² = 89413732822080578, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211439083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105719991 + 105719992.

It is an arithmetic number, because the mean of its divisors is an integer number (105719992).

Almost surely, 2^211439983 is an apocalyptic number.

211439983 is a deficient number, since it is larger than the sum of its proper divisors (1).

211439983 is an equidigital number, since it uses as much as digits as its factorization.

211439983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 40.

The square root of 211439983 is about 14540.9759988799. The cubic root of 211439983 is about 595.7476964224.

The spelling of 211439983 in words is "two hundred eleven million, four hundred thirty-nine thousand, nine hundred eighty-three".