345205121255 has 8 divisors (see below), whose sum is σ = 414254097600. Its totient is φ = 276158795616.

The previous prime is 345205121227. The next prime is 345205121257. The reversal of 345205121255 is 552121502543.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 345205121255 - 2⁸ = 345205120999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345205121257) 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 7 ways as a sum of consecutive naturals, for example, 363920 + ... + 907109.

It is an arithmetic number, because the mean of its divisors is an integer number (51781762200).

Almost surely, 2^345205121255 is an apocalyptic number.

345205121255 is a deficient number, since it is larger than the sum of its proper divisors (69048976345).

345205121255 is a wasteful number, since it uses less digits than its factorization.

345205121255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1325353.

The product of its (nonzero) digits is 60000, while the sum is 35.

Adding to 345205121255 its reverse (552121502543), we get a palindrome (897326623798).

The spelling of 345205121255 in words is "three hundred forty-five billion, two hundred five million, one hundred twenty-one thousand, two hundred fifty-five".