54013821 has 16 divisors (see below), whose sum is σ = 77184384. Its totient is φ = 33511104.

The previous prime is 54013807. The next prime is 54013831. The reversal of 54013821 is 12831045.

It is not a de Polignac number, because 54013821 - 2⁷ = 54013693 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 54013791 and 54013800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54013831) 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, 8026 + ... + 13131.

It is an arithmetic number, because the mean of its divisors is an integer number (4824024).

Almost surely, 2^54013821 is an apocalyptic number.

It is an amenable number.

54013821 is a deficient number, since it is larger than the sum of its proper divisors (23170563).

54013821 is a wasteful number, since it uses less digits than its factorization.

54013821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21220.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 54013821 is about 7349.4095681218. The cubic root of 54013821 is about 378.0085591970.

Adding to 54013821 its reverse (12831045), we get a palindrome (66844866).

The spelling of 54013821 in words is "fifty-four million, thirteen thousand, eight hundred twenty-one".