100031020 has 24 divisors (see below), whose sum is σ = 210268800. Its totient is φ = 39973632.

The previous prime is 100031011. The next prime is 100031039. The reversal of 100031020 is 20130001.

It is a junction number, because it is equal to n+sod(n) for n = 100030994 and 100031012.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28101 + ... + 31459.

It is an arithmetic number, because the mean of its divisors is an integer number (8761200).

Almost surely, 2^100031020 is an apocalyptic number.

100031020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100031020 is an abundant number, since it is smaller than the sum of its proper divisors (110237780).

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

100031020 is a wasteful number, since it uses less digits than its factorization.

100031020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4857 (or 4855 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 7.

The square root of 100031020 is about 10001.5508797386. The cubic root of 100031020 is about 464.2068724281.

Adding to 100031020 its reverse (20130001), we get a palindrome (120161021).

The spelling of 100031020 in words is "one hundred million, thirty-one thousand, twenty".