100331020 has 24 divisors (see below), whose sum is σ = 221785200. Its totient is φ = 38020032.

The previous prime is 100331017. The next prime is 100331051. The reversal of 100331020 is 20133001.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 100330988 and 100331006.

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, 131635 + ... + 132394.

It is an arithmetic number, because the mean of its divisors is an integer number (9241050).

Almost surely, 2^100331020 is an apocalyptic number.

100331020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100331020 is an abundant number, since it is smaller than the sum of its proper divisors (121454180).

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

100331020 is a wasteful number, since it uses less digits than its factorization.

100331020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264057 (or 264055 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 10.

The square root of 100331020 is about 10016.5373258427. The cubic root of 100331020 is about 464.6704722006.

Adding to 100331020 its reverse (20133001), we get a palindrome (120464021).

It can be divided in two parts, 1003 and 31020, that added together give a palindrome (32023).

The spelling of 100331020 in words is "one hundred million, three hundred thirty-one thousand, twenty".