2331145440 has 576 divisors, whose sum is σ = 9208442880. Its totient is φ = 549918720.

The previous prime is 2331145423. The next prime is 2331145457. The reversal of 2331145440 is 445411332.

It is a happy number.

2331145440 is a `hidden beast` number, since 2 + 3 + 3 + 114 + 544 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (2331145423) and next prime (2331145457).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 22632429 + ... + 22632531.

It is an arithmetic number, because the mean of its divisors is an integer number (15986880).

Almost surely, 2^2331145440 is an apocalyptic number.

2331145440 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 2331145440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4604221440).

2331145440 is an abundant number, since it is smaller than the sum of its proper divisors (6877297440).

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

2331145440 is a wasteful number, since it uses less digits than its factorization.

2331145440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184 (or 157 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 2331145440 is about 48281.9369951124. The cubic root of 2331145440 is about 1325.9377133372.

Adding to 2331145440 its reverse (445411332), we get a palindrome (2776556772).

The spelling of 2331145440 in words is "two billion, three hundred thirty-one million, one hundred forty-five thousand, four hundred forty".