345220554 has 32 divisors (see below), whose sum is σ = 789626880. Its totient is φ = 98565552.

The previous prime is 345220543. The next prime is 345220571. The reversal of 345220554 is 455022543.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112687 + ... + 115709.

It is an arithmetic number, because the mean of its divisors is an integer number (24675840).

Almost surely, 2^345220554 is an apocalyptic number.

345220554 is an abundant number, since it is smaller than the sum of its proper divisors (444406326).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

345220554 is a wasteful number, since it uses less digits than its factorization.

345220554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5754.

The product of its (nonzero) digits is 24000, while the sum is 30.

The square root of 345220554 is about 18580.1117865313. Note that the first 3 decimals coincide. The cubic root of 345220554 is about 701.5073328337.

The spelling of 345220554 in words is "three hundred forty-five million, two hundred twenty thousand, five hundred fifty-four".