212311907 has 2 divisors, whose sum is σ = 212311908. Its totient is φ = 212311906.

The previous prime is 212311877. The next prime is 212311961. The reversal of 212311907 is 709113212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212311907 - 2⁶ = 212311843 is a prime.

It is not a weakly prime, because it can be changed into another prime (212311607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106155953 + 106155954.

It is an arithmetic number, because the mean of its divisors is an integer number (106155954).

Almost surely, 2^212311907 is an apocalyptic number.

212311907 is a deficient number, since it is larger than the sum of its proper divisors (1).

212311907 is an equidigital number, since it uses as much as digits as its factorization.

212311907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 212311907 is about 14570.9267721720. The cubic root of 212311907 is about 596.5654766690.

The spelling of 212311907 in words is "two hundred twelve million, three hundred eleven thousand, nine hundred seven".