320200155 has 64 divisors (see below), whose sum is σ = 624153600. Its totient is φ = 154460160.

The previous prime is 320200129. The next prime is 320200157. The reversal of 320200155 is 551002023.

It is a happy number.

It is not a de Polignac number, because 320200155 - 2⁵ = 320200123 is a prime.

It is a super-6 number, since 6×320200155⁶ (a number of 52 digits) contains 666666 as substring.

It is not an unprimeable number, because it can be changed into a prime (320200157) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 381226 + ... + 382064.

It is an arithmetic number, because the mean of its divisors is an integer number (9752400).

Almost surely, 2^320200155 is an apocalyptic number.

320200155 is a deficient number, since it is larger than the sum of its proper divisors (303953445).

320200155 is a wasteful number, since it uses less digits than its factorization.

320200155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1121 (or 1115 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 320200155 is about 17894.1374477788. The cubic root of 320200155 is about 684.1329573794.

Adding to 320200155 its reverse (551002023), we get a palindrome (871202178).

The spelling of 320200155 in words is "three hundred twenty million, two hundred thousand, one hundred fifty-five".