54387257 has 4 divisors (see below), whose sum is σ = 54527460. Its totient is φ = 54247056.

The previous prime is 54387191. The next prime is 54387259. The reversal of 54387257 is 75278345.

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

It can be written as a sum of positive squares in 2 ways, for example, as 16883881 + 37503376 = 4109^2 + 6124^2 .

It is a cyclic number.

It is not a de Polignac number, because 54387257 - 2¹⁶ = 54321721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54387259) 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, 69518 + ... + 70295.

It is an arithmetic number, because the mean of its divisors is an integer number (13631865).

Almost surely, 2^54387257 is an apocalyptic number.

It is an amenable number.

54387257 is a deficient number, since it is larger than the sum of its proper divisors (140203).

54387257 is a wasteful number, since it uses less digits than its factorization.

54387257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140202.

The product of its digits is 235200, while the sum is 41.

The square root of 54387257 is about 7374.7716574820. The cubic root of 54387257 is about 378.8777066837.

The spelling of 54387257 in words is "fifty-four million, three hundred eighty-seven thousand, two hundred fifty-seven".