320130155 has 8 divisors (see below), whose sum is σ = 385849872. Its totient is φ = 254975008.

The previous prime is 320130137. The next prime is 320130157. The reversal of 320130155 is 551031023.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 320130155 - 2⁸ = 320129899 is a prime.

It is a super-2 number, since 2×320130155² = 204966632280648050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320130157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139892 + ... + 142161.

It is an arithmetic number, because the mean of its divisors is an integer number (48231234).

Almost surely, 2^320130155 is an apocalyptic number.

320130155 is a deficient number, since it is larger than the sum of its proper divisors (65719717).

320130155 is a wasteful number, since it uses less digits than its factorization.

320130155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282285.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 320130155 is about 17892.1813929996. The cubic root of 320130155 is about 684.0831002339.

Adding to 320130155 its reverse (551031023), we get a palindrome (871161178).

The spelling of 320130155 in words is "three hundred twenty million, one hundred thirty thousand, one hundred fifty-five".