54131440 has 80 divisors (see below), whose sum is σ = 138607200. Its totient is φ = 19496960.

The previous prime is 54131431. The next prime is 54131447. The reversal of 54131440 is 4413145.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54131447) 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, 120336 + ... + 120784.

It is an arithmetic number, because the mean of its divisors is an integer number (1732590).

Almost surely, 2^54131440 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 54131440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69303600).

54131440 is an abundant number, since it is smaller than the sum of its proper divisors (84475760).

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

54131440 is a wasteful number, since it uses less digits than its factorization.

54131440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610 (or 604 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 54131440 is about 7357.4071519796. The cubic root of 54131440 is about 378.2827405982.

Adding to 54131440 its reverse (4413145), we get a palindrome (58544585).

The spelling of 54131440 in words is "fifty-four million, one hundred thirty-one thousand, four hundred forty".