350612543221 has 4 divisors (see below), whose sum is σ = 350621731852. Its totient is φ = 350603354592.

The previous prime is 350612543173. The next prime is 350612543227. The reversal of 350612543221 is 122345216053.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122345216053 = 157211 ⋅778223.

It can be written as a sum of positive squares in 2 ways, for example, as 202473000900 + 148139542321 = 449970^2 + 384889^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-350612543221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (350612543227) 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 in 3 ways as a sum of consecutive naturals, for example, 4536840 + ... + 4613473.

It is an arithmetic number, because the mean of its divisors is an integer number (87655432963).

Almost surely, 2^350612543221 is an apocalyptic number.

It is an amenable number.

350612543221 is a deficient number, since it is larger than the sum of its proper divisors (9188631).

350612543221 is an equidigital number, since it uses as much as digits as its factorization.

350612543221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9188630.

The product of its (nonzero) digits is 43200, while the sum is 34.

Adding to 350612543221 its reverse (122345216053), we get a palindrome (472957759274).

The spelling of 350612543221 in words is "three hundred fifty billion, six hundred twelve million, five hundred forty-three thousand, two hundred twenty-one".