54021999 has 8 divisors (see below), whose sum is σ = 73388592. Its totient is φ = 35335040.

The previous prime is 54021991. The next prime is 54022019. The reversal of 54021999 is 99912045.

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 54021999 - 2³ = 54021991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54021991) 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, 169722 + ... + 170039.

It is an arithmetic number, because the mean of its divisors is an integer number (9173574).

Almost surely, 2^54021999 is an apocalyptic number.

54021999 is a deficient number, since it is larger than the sum of its proper divisors (19366593).

54021999 is a wasteful number, since it uses less digits than its factorization.

54021999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339817.

The product of its (nonzero) digits is 29160, while the sum is 39.

The square root of 54021999 is about 7349.9659182883. The cubic root of 54021999 is about 378.0276357836.

The spelling of 54021999 in words is "fifty-four million, twenty-one thousand, nine hundred ninety-nine".