2231311020 has 96 divisors (see below), whose sum is σ = 6425588736. Its totient is φ = 578188800.

The previous prime is 2231311001. The next prime is 2231311031. The reversal of 2231311020 is 201131322.

It is a super-3 number, since 3×2231311020³ (a number of 29 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 664987 + ... + 668333.

It is an arithmetic number, because the mean of its divisors is an integer number (66933216).

Almost surely, 2^2231311020 is an apocalyptic number.

2231311020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2231311020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3212794368).

2231311020 is an abundant number, since it is smaller than the sum of its proper divisors (4194277716).

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

2231311020 is a wasteful number, since it uses less digits than its factorization.

2231311020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3671 (or 3669 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 2231311020 is about 47236.7549689858. The cubic root of 2231311020 is about 1306.7325324577.

Adding to 2231311020 its reverse (201131322), we get a palindrome (2432442342).

It can be divided in two parts, 22313 and 11020, that added together give a palindrome (33333).

The spelling of 2231311020 in words is "two billion, two hundred thirty-one million, three hundred eleven thousand, twenty".