54135306021 has 4 divisors (see below), whose sum is σ = 72180408032. Its totient is φ = 36090204012.

The previous prime is 54135305993. The next prime is 54135306047. The reversal of 54135306021 is 12060353145.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 54135306021 - 2⁶ = 54135305957 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 54135306021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54135306061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9022551001 + ... + 9022551006.

It is an arithmetic number, because the mean of its divisors is an integer number (18045102008).

Almost surely, 2^54135306021 is an apocalyptic number.

It is an amenable number.

54135306021 is a deficient number, since it is larger than the sum of its proper divisors (18045102011).

54135306021 is a wasteful number, since it uses less digits than its factorization.

54135306021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18045102010.

The product of its (nonzero) digits is 10800, while the sum is 30.

Adding to 54135306021 its reverse (12060353145), we get a palindrome (66195659166).

The spelling of 54135306021 in words is "fifty-four billion, one hundred thirty-five million, three hundred six thousand, twenty-one".