54520091 has 4 divisors (see below), whose sum is σ = 54758400. Its totient is φ = 54281784.

The previous prime is 54520073. The next prime is 54520157. The reversal of 54520091 is 19002545.

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 54520091 - 2⁶ = 54520027 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 54520091.

It is not an unprimeable number, because it can be changed into a prime (54520021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118811 + ... + 119268.

It is an arithmetic number, because the mean of its divisors is an integer number (13689600).

Almost surely, 2^54520091 is an apocalyptic number.

54520091 is a deficient number, since it is larger than the sum of its proper divisors (238309).

54520091 is a wasteful number, since it uses less digits than its factorization.

54520091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238308.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 54520091 is about 7383.7721389545. The cubic root of 54520091 is about 379.1859095388.

The spelling of 54520091 in words is "fifty-four million, five hundred twenty thousand, ninety-one".