345421555 has 16 divisors (see below), whose sum is σ = 440549280. Its totient is φ = 259098112.

The previous prime is 345421553. The next prime is 345421579. The reversal of 345421555 is 555124543.

It is a cyclic number.

It is not a de Polignac number, because 345421555 - 2¹ = 345421553 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 345421555.

It is not an unprimeable number, because it can be changed into a prime (345421553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15312 + ... + 30418.

It is an arithmetic number, because the mean of its divisors is an integer number (27534330).

Almost surely, 2^345421555 is an apocalyptic number.

345421555 is a deficient number, since it is larger than the sum of its proper divisors (95127725).

345421555 is a wasteful number, since it uses less digits than its factorization.

345421555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15398.

The product of its digits is 60000, while the sum is 34.

The square root of 345421555 is about 18585.5200357698. The cubic root of 345421555 is about 701.6434548158.

The spelling of 345421555 in words is "three hundred forty-five million, four hundred twenty-one thousand, five hundred fifty-five".