212225971 has 2 divisors, whose sum is σ = 212225972. Its totient is φ = 212225970.

The previous prime is 212225927. The next prime is 212225987. The reversal of 212225971 is 179522212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212225971 - 2⁷ = 212225843 is a prime.

It is not a weakly prime, because it can be changed into another prime (212225911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106112985 + 106112986.

It is an arithmetic number, because the mean of its divisors is an integer number (106112986).

Almost surely, 2^212225971 is an apocalyptic number.

212225971 is a deficient number, since it is larger than the sum of its proper divisors (1).

212225971 is an equidigital number, since it uses as much as digits as its factorization.

212225971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 31.

The square root of 212225971 is about 14567.9775878466. The cubic root of 212225971 is about 596.4849766004.

The spelling of 212225971 in words is "two hundred twelve million, two hundred twenty-five thousand, nine hundred seventy-one".