320552145 has 24 divisors (see below), whose sum is σ = 569178792. Its totient is φ = 166790400.

The previous prime is 320552129. The next prime is 320552147. The reversal of 320552145 is 541255023.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 535824 + 320016321 = 732^2 + 17889^2 .

It is not a de Polignac number, because 320552145 - 2⁴ = 320552129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (320552147) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85026 + ... + 88715.

It is an arithmetic number, because the mean of its divisors is an integer number (23715783).

Almost surely, 2^320552145 is an apocalyptic number.

It is an amenable number.

320552145 is a deficient number, since it is larger than the sum of its proper divisors (248626647).

320552145 is a wasteful number, since it uses less digits than its factorization.

320552145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173793 (or 173790 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 320552145 is about 17903.9700904576. The cubic root of 320552145 is about 684.3835504030.

The spelling of 320552145 in words is "three hundred twenty million, five hundred fifty-two thousand, one hundred forty-five".