54251440 has 40 divisors (see below), whose sum is σ = 126741888. Its totient is φ = 21596160.

The previous prime is 54251429. The next prime is 54251447. The reversal of 54251440 is 4415245.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (54251447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16320 + ... + 19360.

Almost surely, 2^54251440 is an apocalyptic number.

It is an amenable number.

54251440 is an abundant number, since it is smaller than the sum of its proper divisors (72490448).

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

54251440 is a wasteful number, since it uses less digits than its factorization.

54251440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3277 (or 3271 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 54251440 is about 7365.5576842490. The cubic root of 54251440 is about 378.5620633395.

Adding to 54251440 its reverse (4415245), we get a palindrome (58666685).

The spelling of 54251440 in words is "fifty-four million, two hundred fifty-one thousand, four hundred forty".