54257509 has 2 divisors, whose sum is σ = 54257510. Its totient is φ = 54257508.

The previous prime is 54257507. The next prime is 54257513. The reversal of 54257509 is 90575245.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52969284 + 1288225 = 7278^2 + 1135^2 .

It is a cyclic number.

It is not a de Polignac number, because 54257509 - 2¹ = 54257507 is a prime.

Together with 54257507, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54257501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27128754 + 27128755.

It is an arithmetic number, because the mean of its divisors is an integer number (27128755).

Almost surely, 2^54257509 is an apocalyptic number.

It is an amenable number.

54257509 is a deficient number, since it is larger than the sum of its proper divisors (1).

54257509 is an equidigital number, since it uses as much as digits as its factorization.

54257509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63000, while the sum is 37.

The square root of 54257509 is about 7365.9696578251. The cubic root of 54257509 is about 378.5761791399.

The spelling of 54257509 in words is "fifty-four million, two hundred fifty-seven thousand, five hundred nine".