347575161221 has 2 divisors, whose sum is σ = 347575161222. Its totient is φ = 347575161220.

The previous prime is 347575161187. The next prime is 347575161239. The reversal of 347575161221 is 122161575743.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 339002253121 + 8572908100 = 582239^2 + 92590^2 .

It is a cyclic number.

It is not a de Polignac number, because 347575161221 - 2²⁶ = 347508052357 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (347575161821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173787580610 + 173787580611.

It is an arithmetic number, because the mean of its divisors is an integer number (173787580611).

Almost surely, 2^347575161221 is an apocalyptic number.

It is an amenable number.

347575161221 is a deficient number, since it is larger than the sum of its proper divisors (1).

347575161221 is an equidigital number, since it uses as much as digits as its factorization.

347575161221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 352800, while the sum is 44.

The spelling of 347575161221 in words is "three hundred forty-seven billion, five hundred seventy-five million, one hundred sixty-one thousand, two hundred twenty-one".