54135021 has 32 divisors (see below), whose sum is σ = 79930368. Its totient is φ = 32440320.

The previous prime is 54135019. The next prime is 54135073. The reversal of 54135021 is 12053145.

54135021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 54135021 - 2¹ = 54135019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54135001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 153181 + ... + 153533.

It is an arithmetic number, because the mean of its divisors is an integer number (2497824).

Almost surely, 2^54135021 is an apocalyptic number.

54135021 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

54135021 is a deficient number, since it is larger than the sum of its proper divisors (25795347).

54135021 is a wasteful number, since it uses less digits than its factorization.

54135021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 54135021 is about 7357.6505081446. The cubic root of 54135021 is about 378.2910820268.

Adding to 54135021 its reverse (12053145), we get a palindrome (66188166).

The spelling of 54135021 in words is "fifty-four million, one hundred thirty-five thousand, twenty-one".