54642021 has 16 divisors (see below), whose sum is σ = 83380224. Its totient is φ = 31180464.

The previous prime is 54642013. The next prime is 54642041. The reversal of 54642021 is 12024645.

It is not a de Polignac number, because 54642021 - 2³ = 54642013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 54641982 and 54642000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54642041) 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, 19320 + ... + 21966.

It is an arithmetic number, because the mean of its divisors is an integer number (5211264).

Almost surely, 2^54642021 is an apocalyptic number.

It is an amenable number.

54642021 is a deficient number, since it is larger than the sum of its proper divisors (28738203).

54642021 is a wasteful number, since it uses less digits than its factorization.

54642021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3640.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 54642021 is about 7392.0241476878. The cubic root of 54642021 is about 379.4683724712.

Adding to 54642021 its reverse (12024645), we get a palindrome (66666666).

The spelling of 54642021 in words is "fifty-four million, six hundred forty-two thousand, twenty-one".