2031100220 has 24 divisors (see below), whose sum is σ = 4266351600. Its totient is φ = 812241792.

The previous prime is 2031100199. The next prime is 2031100229. The reversal of 2031100220 is 220011302.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2031100229) 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, 93776 + ... + 113384.

It is an arithmetic number, because the mean of its divisors is an integer number (177764650).

Almost surely, 2^2031100220 is an apocalyptic number.

2031100220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2031100220 is an abundant number, since it is smaller than the sum of its proper divisors (2235251380).

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

2031100220 is a wasteful number, since it uses less digits than its factorization.

2031100220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24797 (or 24795 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 2031100220 is about 45067.7292527591. The cubic root of 2031100220 is about 1266.4181255966.

Adding to 2031100220 its reverse (220011302), we get a palindrome (2251111522).

The spelling of 2031100220 in words is "two billion, thirty-one million, one hundred thousand, two hundred twenty".