355220240447 has 2 divisors, whose sum is σ = 355220240448. Its totient is φ = 355220240446.

The previous prime is 355220240429. The next prime is 355220240563. The reversal of 355220240447 is 744042022553.

It is a weak prime.

It is an emirp because it is prime and its reverse (744042022553) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 355220240447 - 2²⁶ = 355153131583 is a prime.

It is a super-3 number, since 3×355220240447³ (a number of 36 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 355220240447.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (355220240407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177610120223 + 177610120224.

It is an arithmetic number, because the mean of its divisors is an integer number (177610120224).

Almost surely, 2^355220240447 is an apocalyptic number.

355220240447 is a deficient number, since it is larger than the sum of its proper divisors (1).

355220240447 is an equidigital number, since it uses as much as digits as its factorization.

355220240447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 268800, while the sum is 38.

The spelling of 355220240447 in words is "three hundred fifty-five billion, two hundred twenty million, two hundred forty thousand, four hundred forty-seven".