305212404240197 has 2 divisors, whose sum is σ = 305212404240198. Its totient is φ = 305212404240196.

The previous prime is 305212404240151. The next prime is 305212404240277. The reversal of 305212404240197 is 791042404212503.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 212462137318561 + 92750266921636 = 14576081^2 + 9630694^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-305212404240197 is a prime.

It is a super-2 number, since 2×305212404240197² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (305212400240197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152606202120098 + 152606202120099.

It is an arithmetic number, because the mean of its divisors is an integer number (152606202120099).

Almost surely, 2^{305212404240197} is an apocalyptic number.

It is an amenable number.

305212404240197 is a deficient number, since it is larger than the sum of its proper divisors (1).

305212404240197 is an equidigital number, since it uses as much as digits as its factorization.

305212404240197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 483840, while the sum is 44.

The spelling of 305212404240197 in words is "three hundred five trillion, two hundred twelve billion, four hundred four million, two hundred forty thousand, one hundred ninety-seven".