212428005917 has 2 divisors, whose sum is σ = 212428005918. Its totient is φ = 212428005916.

The previous prime is 212428005877. The next prime is 212428005941. The reversal of 212428005917 is 719500824212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 203594073796 + 8833932121 = 451214^2 + 93989^2 .

It is a cyclic number.

It is not a de Polignac number, because 212428005917 - 2²⁶ = 212360897053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212428005997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106214002958 + 106214002959.

It is an arithmetic number, because the mean of its divisors is an integer number (106214002959).

Almost surely, 2^212428005917 is an apocalyptic number.

It is an amenable number.

212428005917 is a deficient number, since it is larger than the sum of its proper divisors (1).

212428005917 is an equidigital number, since it uses as much as digits as its factorization.

212428005917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 41.

The spelling of 212428005917 in words is "two hundred twelve billion, four hundred twenty-eight million, five thousand, nine hundred seventeen".