212071823 has 2 divisors, whose sum is σ = 212071824. Its totient is φ = 212071822.

The previous prime is 212071813. The next prime is 212071843. The reversal of 212071823 is 328170212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212071823 - 2⁶ = 212071759 is a prime.

It is a super-2 number, since 2×212071823² = 89948916221086658, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212071792 and 212071801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212071813) 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, 106035911 + 106035912.

It is an arithmetic number, because the mean of its divisors is an integer number (106035912).

Almost surely, 2^212071823 is an apocalyptic number.

212071823 is a deficient number, since it is larger than the sum of its proper divisors (1).

212071823 is an equidigital number, since it uses as much as digits as its factorization.

212071823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 212071823 is about 14562.6859816450. The cubic root of 212071823 is about 596.3405248535.

The spelling of 212071823 in words is "two hundred twelve million, seventy-one thousand, eight hundred twenty-three".