54421999 has 4 divisors (see below), whose sum is σ = 54503064. Its totient is φ = 54340936.

The previous prime is 54421993. The next prime is 54422003. The reversal of 54421999 is 99912445.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 54421999 - 2⁵ = 54421967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54421993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39517 + ... + 40870.

It is an arithmetic number, because the mean of its divisors is an integer number (13625766).

Almost surely, 2^54421999 is an apocalyptic number.

54421999 is a deficient number, since it is larger than the sum of its proper divisors (81065).

54421999 is an equidigital number, since it uses as much as digits as its factorization.

54421999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81064.

The product of its digits is 116640, while the sum is 43.

The square root of 54421999 is about 7377.1267442006. The cubic root of 54421999 is about 378.9583638585.

The spelling of 54421999 in words is "fifty-four million, four hundred twenty-one thousand, nine hundred ninety-nine".