212032981 has 2 divisors, whose sum is σ = 212032982. Its totient is φ = 212032980.

The previous prime is 212032937. The next prime is 212033009. The reversal of 212032981 is 189230212.

It is an a-pointer prime, because the next prime (212033009) can be obtained adding 212032981 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134768881 + 77264100 = 11609^2 + 8790^2 .

It is a cyclic number.

It is not a de Polignac number, because 212032981 - 2¹¹ = 212030933 is a prime.

It is a super-2 number, since 2×212032981² = 89915970063492722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212032921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106016490 + 106016491.

It is an arithmetic number, because the mean of its divisors is an integer number (106016491).

Almost surely, 2^212032981 is an apocalyptic number.

It is an amenable number.

212032981 is a deficient number, since it is larger than the sum of its proper divisors (1).

212032981 is an equidigital number, since it uses as much as digits as its factorization.

212032981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 212032981 is about 14561.3523067056. The cubic root of 212032981 is about 596.3041150614.

The spelling of 212032981 in words is "two hundred twelve million, thirty-two thousand, nine hundred eighty-one".