54240817 has 4 divisors (see below), whose sum is σ = 56111220. Its totient is φ = 52370416.

The previous prime is 54240803. The next prime is 54240821. The reversal of 54240817 is 71804245.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71804245 = 5 ⋅14360849.

It can be written as a sum of positive squares in 2 ways, for example, as 27625536 + 26615281 = 5256^2 + 5159^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54240817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54240317) 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, 935158 + ... + 935215.

It is an arithmetic number, because the mean of its divisors is an integer number (14027805).

Almost surely, 2^54240817 is an apocalyptic number.

It is an amenable number.

54240817 is a deficient number, since it is larger than the sum of its proper divisors (1870403).

54240817 is a wasteful number, since it uses less digits than its factorization.

54240817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1870402.

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 54240817 is about 7364.8365222862. The cubic root of 54240817 is about 378.5373529213.

The spelling of 54240817 in words is "fifty-four million, two hundred forty thousand, eight hundred seventeen".