54320391 has 24 divisors (see below), whose sum is σ = 80593344. Its totient is φ = 35239680.

The previous prime is 54320353. The next prime is 54320437. The reversal of 54320391 is 19302345.

It is not a de Polignac number, because 54320391 - 2¹¹ = 54318343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54320341) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 118635 + ... + 119091.

It is an arithmetic number, because the mean of its divisors is an integer number (3358056).

Almost surely, 2^54320391 is an apocalyptic number.

54320391 is a deficient number, since it is larger than the sum of its proper divisors (26272953).

54320391 is a wasteful number, since it uses less digits than its factorization.

54320391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791 (or 788 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 54320391 is about 7370.2368347293. The cubic root of 54320391 is about 378.7223735690.

The spelling of 54320391 in words is "fifty-four million, three hundred twenty thousand, three hundred ninety-one".