54171540 has 36 divisors (see below), whose sum is σ = 164320884. Its totient is φ = 14445696.

The previous prime is 54171521. The next prime is 54171563. The reversal of 54171540 is 4517145.

It is a happy number.

54171540 is a `hidden beast` number, since 54 + 1 + 71 + 540 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 24621444 + 29550096 = 4962^2 + 5436^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 150297 + ... + 150656.

It is an arithmetic number, because the mean of its divisors is an integer number (4564469).

Almost surely, 2^54171540 is an apocalyptic number.

It is an amenable number.

54171540 is an abundant number, since it is smaller than the sum of its proper divisors (110149344).

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

54171540 is a wasteful number, since it uses less digits than its factorization.

54171540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300968 (or 300963 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 54171540 is about 7360.1317922983. The cubic root of 54171540 is about 378.3761268307.

Adding to 54171540 its reverse (4517145), we get a palindrome (58688685).

The spelling of 54171540 in words is "fifty-four million, one hundred seventy-one thousand, five hundred forty".