2231540020 has 48 divisors (see below), whose sum is σ = 4978290240. Its totient is φ = 837333504.

The previous prime is 2231539963. The next prime is 2231540023. The reversal of 2231540020 is 200451322.

It is a super-3 number, since 3×2231540020³ (a number of 29 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2231540020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2231540023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93691 + ... + 115069.

It is an arithmetic number, because the mean of its divisors is an integer number (103714380).

Almost surely, 2^2231540020 is an apocalyptic number.

2231540020 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 2231540020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2489145120).

2231540020 is an abundant number, since it is smaller than the sum of its proper divisors (2746750220).

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

2231540020 is a wasteful number, since it uses less digits than its factorization.

2231540020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21712 (or 21710 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 2231540020 is about 47239.1788666992. The cubic root of 2231540020 is about 1306.7772343558. Note that the first 3 decimals are identical.

Adding to 2231540020 its reverse (200451322), we get a palindrome (2431991342).

The spelling of 2231540020 in words is "two billion, two hundred thirty-one million, five hundred forty thousand, twenty".