54151440 has 80 divisors (see below), whose sum is σ = 191856768. Its totient is φ = 12377088.

The previous prime is 54151421. The next prime is 54151457. The reversal of 54151440 is 4415145.

It is a happy number.

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 (24).

It is a self number, because there is not a number n which added to its sum of digits gives 54151440.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14437 + ... + 17796.

Almost surely, 2^54151440 is an apocalyptic number.

It is an amenable number.

54151440 is an abundant number, since it is smaller than the sum of its proper divisors (137705328).

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

54151440 is a wasteful number, since it uses less digits than its factorization.

54151440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32256 (or 32250 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 54151440 is about 7358.7662009334. The cubic root of 54151440 is about 378.3293230355.

Adding to 54151440 its reverse (4415145), we get a palindrome (58566585).

The spelling of 54151440 in words is "fifty-four million, one hundred fifty-one thousand, four hundred forty".