214225981 has 2 divisors, whose sum is σ = 214225982. Its totient is φ = 214225980.

The previous prime is 214225919. The next prime is 214226011. The reversal of 214225981 is 189522412.

214225981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 171845881 + 42380100 = 13109^2 + 6510^2 .

It is a cyclic number.

It is not a de Polignac number, because 214225981 - 2²⁵ = 180671549 is a prime.

It is a super-2 number, since 2×214225981² = 91785541870824722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (214225481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107112990 + 107112991.

It is an arithmetic number, because the mean of its divisors is an integer number (107112991).

Almost surely, 2^214225981 is an apocalyptic number.

It is an amenable number.

214225981 is a deficient number, since it is larger than the sum of its proper divisors (1).

214225981 is an equidigital number, since it uses as much as digits as its factorization.

214225981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 34.

The square root of 214225981 is about 14636.4606718974. The cubic root of 214225981 is about 598.3528722361.

The spelling of 214225981 in words is "two hundred fourteen million, two hundred twenty-five thousand, nine hundred eighty-one".