54128715 has 16 divisors (see below), whose sum is σ = 86699808. Its totient is φ = 28837376.

The previous prime is 54128713. The next prime is 54128719. The reversal of 54128715 is 51782145.

It is a cyclic number.

It is not a de Polignac number, because 54128715 - 2¹ = 54128713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (54128713) 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, 21187 + ... + 23603.

It is an arithmetic number, because the mean of its divisors is an integer number (5418738).

Almost surely, 2^54128715 is an apocalyptic number.

54128715 is a deficient number, since it is larger than the sum of its proper divisors (32571093).

54128715 is a wasteful number, since it uses less digits than its factorization.

54128715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3918.

The product of its digits is 11200, while the sum is 33.

The square root of 54128715 is about 7357.2219621267. The cubic root of 54128715 is about 378.2763928530.

The spelling of 54128715 in words is "fifty-four million, one hundred twenty-eight thousand, seven hundred fifteen".