320123100 has 72 divisors (see below), whose sum is σ = 1010435328. Its totient is φ = 77604800.

The previous prime is 320123099. The next prime is 320123101. The reversal of 320123100 is 1321023.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (320123099) and next prime (320123101).

It is a super-2 number, since 2×320123100² = 204957598307220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320123101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45204 + ... + 51803.

It is an arithmetic number, because the mean of its divisors is an integer number (14033824).

Almost surely, 2^320123100 is an apocalyptic number.

320123100 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

320123100 is an abundant number, since it is smaller than the sum of its proper divisors (690312228).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

320123100 is a wasteful number, since it uses less digits than its factorization.

320123100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97035 (or 97028 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 320123100 is about 17891.9842387590. The cubic root of 320123100 is about 684.0780749427.

Adding to 320123100 its reverse (1321023), we get a palindrome (321444123).

The spelling of 320123100 in words is "three hundred twenty million, one hundred twenty-three thousand, one hundred".