320055145 has 16 divisors (see below), whose sum is σ = 388080000. Its totient is φ = 253381248.

The previous prime is 320055137. The next prime is 320055161. The reversal of 320055145 is 541550023.

It is a cyclic number.

It is not a de Polignac number, because 320055145 - 2³ = 320055137 is a prime.

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, 304581 + ... + 305629.

It is an arithmetic number, because the mean of its divisors is an integer number (24255000).

Almost surely, 2^320055145 is an apocalyptic number.

It is an amenable number.

320055145 is a deficient number, since it is larger than the sum of its proper divisors (68024855).

320055145 is a wasteful number, since it uses less digits than its factorization.

320055145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1632.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 320055145 is about 17890.0851032073. The cubic root of 320055145 is about 684.0296666738.

The spelling of 320055145 in words is "three hundred twenty million, fifty-five thousand, one hundred forty-five".