54256309 has 2 divisors, whose sum is σ = 54256310. Its totient is φ = 54256308.

The previous prime is 54256297. The next prime is 54256313. The reversal of 54256309 is 90365245.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47651409 + 6604900 = 6903^2 + 2570^2 .

It is a cyclic number.

It is not a de Polignac number, because 54256309 - 2¹⁵ = 54223541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54256339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27128154 + 27128155.

It is an arithmetic number, because the mean of its divisors is an integer number (27128155).

Almost surely, 2^54256309 is an apocalyptic number.

It is an amenable number.

54256309 is a deficient number, since it is larger than the sum of its proper divisors (1).

54256309 is an equidigital number, since it uses as much as digits as its factorization.

54256309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 54256309 is about 7365.8882017039. Note that the first 3 decimals coincide. The cubic root of 54256309 is about 378.5733881605.

The spelling of 54256309 in words is "fifty-four million, two hundred fifty-six thousand, three hundred nine".