54145021 has 8 divisors (see below), whose sum is σ = 62239104. Its totient is φ = 46140720.

The previous prime is 54145009. The next prime is 54145031. The reversal of 54145021 is 12054145.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 54145021 - 2²¹ = 52047869 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 54144983 and 54145001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54145031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21145 + ... + 23566.

It is an arithmetic number, because the mean of its divisors is an integer number (7779888).

Almost surely, 2^54145021 is an apocalyptic number.

It is an amenable number.

54145021 is a deficient number, since it is larger than the sum of its proper divisors (8094083).

54145021 is a wasteful number, since it uses less digits than its factorization.

54145021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44891.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 54145021 is about 7358.3300415244. The cubic root of 54145021 is about 378.3143736523.

Adding to 54145021 its reverse (12054145), we get a palindrome (66199166).

The spelling of 54145021 in words is "fifty-four million, one hundred forty-five thousand, twenty-one".