54108405731 has 4 divisors (see below), whose sum is σ = 55366740792. Its totient is φ = 52850070672.

The previous prime is 54108405719. The next prime is 54108405761. The reversal of 54108405731 is 13750480145.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54108405731 is a prime.

It is a super-2 number, since 2×54108405731² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54108405761) 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, 629167466 + ... + 629167551.

It is an arithmetic number, because the mean of its divisors is an integer number (13841685198).

Almost surely, 2^54108405731 is an apocalyptic number.

54108405731 is a deficient number, since it is larger than the sum of its proper divisors (1258335061).

54108405731 is a wasteful number, since it uses less digits than its factorization.

54108405731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1258335060.

The product of its (nonzero) digits is 67200, while the sum is 38.

Adding to 54108405731 its reverse (13750480145), we get a palindrome (67858885876).

The spelling of 54108405731 in words is "fifty-four billion, one hundred eight million, four hundred five thousand, seven hundred thirty-one".