54117831 has 4 divisors (see below), whose sum is σ = 72157112. Its totient is φ = 36078552.

The previous prime is 54117829. The next prime is 54117839. The reversal of 54117831 is 13871145.

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

It is not a de Polignac number, because 54117831 - 2¹ = 54117829 is a prime.

It is a super-2 number, since 2×54117831² = 5857479264289122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54117839) 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, 9019636 + ... + 9019641.

It is an arithmetic number, because the mean of its divisors is an integer number (18039278).

Almost surely, 2^54117831 is an apocalyptic number.

54117831 is a deficient number, since it is larger than the sum of its proper divisors (18039281).

54117831 is a wasteful number, since it uses less digits than its factorization.

54117831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18039280.

The product of its digits is 3360, while the sum is 30.

The square root of 54117831 is about 7356.4822435727. The cubic root of 54117831 is about 378.2510370183.

Adding to 54117831 its reverse (13871145), we get a palindrome (67988976).

The spelling of 54117831 in words is "fifty-four million, one hundred seventeen thousand, eight hundred thirty-one".