33440131144 has 96 divisors (see below), whose sum is σ = 74701008000. Its totient is φ = 13986628992.

The previous prime is 33440131141. The next prime is 33440131147. The reversal of 33440131144 is 44113104433.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (33440131141) and next prime (33440131147).

It is a super-2 number, since 2×33440131144² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (33440131141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6980302 + ... + 6985090.

It is an arithmetic number, because the mean of its divisors is an integer number (778135500).

Almost surely, 2^33440131144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 33440131144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37350504000).

33440131144 is an abundant number, since it is smaller than the sum of its proper divisors (41260876856).

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

33440131144 is a wasteful number, since it uses less digits than its factorization.

33440131144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5235 (or 5224 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 33440131144 its reverse (44113104433), we get a palindrome (77553235577).

The spelling of 33440131144 in words is "thirty-three billion, four hundred forty million, one hundred thirty-one thousand, one hundred forty-four".