2231144021500 has 48 divisors (see below), whose sum is σ = 4952700881856. Its totient is φ = 877827144000.

The previous prime is 2231144021441. The next prime is 2231144021503. The reversal of 2231144021500 is 51204411322.

It is a super-3 number, since 3×2231144021500³ (a number of 38 digits) contains 333 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 not an unprimeable number, because it can be changed into a prime (2231144021503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36545632 + ... + 36606631.

It is an arithmetic number, because the mean of its divisors is an integer number (103181268372).

Almost surely, 2^{2231144021500} is an apocalyptic number.

2231144021500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2231144021500 is an abundant number, since it is smaller than the sum of its proper divisors (2721556860356).

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

2231144021500 is a wasteful number, since it uses less digits than its factorization.

2231144021500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73152343 (or 73152331 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 2231144021500 its reverse (51204411322), we get a palindrome (2282348432822).

The spelling of 2231144021500 in words is "two trillion, two hundred thirty-one billion, one hundred forty-four million, twenty-one thousand, five hundred".