212331089 has 2 divisors, whose sum is σ = 212331090. Its totient is φ = 212331088.

The previous prime is 212330999. The next prime is 212331151. The reversal of 212331089 is 980133212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210105025 + 2226064 = 14495^2 + 1492^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212331089 is a prime.

It is not a weakly prime, because it can be changed into another prime (212331389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106165544 + 106165545.

It is an arithmetic number, because the mean of its divisors is an integer number (106165545).

Almost surely, 2^212331089 is an apocalyptic number.

It is an amenable number.

212331089 is a deficient number, since it is larger than the sum of its proper divisors (1).

212331089 is an equidigital number, since it uses as much as digits as its factorization.

212331089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 212331089 is about 14571.5849858552. The cubic root of 212331089 is about 596.5834423349.

It can be divided in two parts, 21233 and 1089, that added together give a palindrome (22322).

The spelling of 212331089 in words is "two hundred twelve million, three hundred thirty-one thousand, eighty-nine".