212289971 has 2 divisors, whose sum is σ = 212289972. Its totient is φ = 212289970.

The previous prime is 212289949. The next prime is 212289989. The reversal of 212289971 is 179982212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212289971 - 2¹⁴ = 212273587 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (212289871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106144985 + 106144986.

It is an arithmetic number, because the mean of its divisors is an integer number (106144986).

Almost surely, 2^212289971 is an apocalyptic number.

212289971 is a deficient number, since it is larger than the sum of its proper divisors (1).

212289971 is an equidigital number, since it uses as much as digits as its factorization.

212289971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 41.

The square root of 212289971 is about 14570.1740209237. The cubic root of 212289971 is about 596.5449303084.

The spelling of 212289971 in words is "two hundred twelve million, two hundred eighty-nine thousand, nine hundred seventy-one".