320145355 has 16 divisors (see below), whose sum is σ = 398099520. Its totient is φ = 246863232.

The previous prime is 320145337. The next prime is 320145361. The reversal of 320145355 is 553541023.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320145355 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, 103897 + ... + 106933.

It is an arithmetic number, because the mean of its divisors is an integer number (24881220).

Almost surely, 2^320145355 is an apocalyptic number.

320145355 is a deficient number, since it is larger than the sum of its proper divisors (77954165).

320145355 is a wasteful number, since it uses less digits than its factorization.

320145355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3798.

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 320145355 is about 17892.6061544986. The cubic root of 320145355 is about 684.0939269746.

Adding to 320145355 its reverse (553541023), we get a palindrome (873686378).

The spelling of 320145355 in words is "three hundred twenty million, one hundred forty-five thousand, three hundred fifty-five".