54021998 has 16 divisors (see below), whose sum is σ = 83434320. Its totient is φ = 26214336.

The previous prime is 54021991. The next prime is 54022019. The reversal of 54021998 is 89912045.

It is a Curzon number.

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, 41465 + ... + 42747.

It is an arithmetic number, because the mean of its divisors is an integer number (5214645).

Almost surely, 2^54021998 is an apocalyptic number.

54021998 is a deficient number, since it is larger than the sum of its proper divisors (29412322).

54021998 is a wasteful number, since it uses less digits than its factorization.

54021998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1891.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 54021998 is about 7349.9658502608. The cubic root of 54021998 is about 378.0276334510.

The spelling of 54021998 in words is "fifty-four million, twenty-one thousand, nine hundred ninety-eight".