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211980049 is a prime number
BaseRepresentation
bin11001010001010…
…00111100010001
3112202212200221221
430220220330101
5413231330144
633011245041
75152541431
oct1450507421
9482780857
10211980049
11a9725826
125aba9781
1334bc01a8
14202202c1
1513923d84
hexca28f11

211980049 has 2 divisors, whose sum is σ = 211980050. Its totient is φ = 211980048.

The previous prime is 211980047. The next prime is 211980059. The reversal of 211980049 is 940089112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211179024 + 801025 = 14532^2 + 895^2 .

It is a cyclic number.

It is not a de Polignac number, because 211980049 - 21 = 211980047 is a prime.

Together with 211980047, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 211979996 and 211980023.

It is not a weakly prime, because it can be changed into another prime (211980047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105990024 + 105990025.

It is an arithmetic number, because the mean of its divisors is an integer number (105990025).

Almost surely, 2211980049 is an apocalyptic number.

It is an amenable number.

211980049 is a deficient number, since it is larger than the sum of its proper divisors (1).

211980049 is an equidigital number, since it uses as much as digits as its factorization.

211980049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 211980049 is about 14559.5346422885. The cubic root of 211980049 is about 596.2544903974.

The spelling of 211980049 in words is "two hundred eleven million, nine hundred eighty thousand, forty-nine".