2109931000 has 64 divisors (see below), whose sum is σ = 5197140000. Its totient is φ = 799545600.

The previous prime is 2109930983. The next prime is 2109931067. The reversal of 2109931000 is 1399012.

It is a super-2 number, since 2×2109931000² = 8903617649522000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36525 + ... + 74524.

Almost surely, 2^2109931000 is an apocalyptic number.

2109931000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2109931000 is an abundant number, since it is smaller than the sum of its proper divisors (3087209000).

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

2109931000 is a wasteful number, since it uses less digits than its factorization.

2109931000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111089 (or 111075 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 2109931000 is about 45933.9852396894. The cubic root of 2109931000 is about 1282.5946311903.

The spelling of 2109931000 in words is "two billion, one hundred nine million, nine hundred thirty-one thousand".