551212223197 has 2 divisors, whose sum is σ = 551212223198. Its totient is φ = 551212223196.

The previous prime is 551212223171. The next prime is 551212223227. The reversal of 551212223197 is 791322212155.

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., 461320790436 + 89891432761 = 679206^2 + 299819^2 .

It is a cyclic number.

It is not a de Polignac number, because 551212223197 - 2⁷ = 551212223069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551212223117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275606111598 + 275606111599.

It is an arithmetic number, because the mean of its divisors is an integer number (275606111599).

Almost surely, 2^551212223197 is an apocalyptic number.

It is an amenable number.

551212223197 is a deficient number, since it is larger than the sum of its proper divisors (1).

551212223197 is an equidigital number, since it uses as much as digits as its factorization.

551212223197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75600, while the sum is 40.

The spelling of 551212223197 in words is "five hundred fifty-one billion, two hundred twelve million, two hundred twenty-three thousand, one hundred ninety-seven".