54081509 has 2 divisors, whose sum is σ = 54081510. Its totient is φ = 54081508.

The previous prime is 54081497. The next prime is 54081527. The reversal of 54081509 is 90518045.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52519009 + 1562500 = 7247^2 + 1250^2 .

It is a cyclic number.

It is not a de Polignac number, because 54081509 - 2⁴ = 54081493 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54081589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27040754 + 27040755.

It is an arithmetic number, because the mean of its divisors is an integer number (27040755).

Almost surely, 2^54081509 is an apocalyptic number.

It is an amenable number.

54081509 is a deficient number, since it is larger than the sum of its proper divisors (1).

54081509 is an equidigital number, since it uses as much as digits as its factorization.

54081509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 54081509 is about 7354.0131220987. The cubic root of 54081509 is about 378.1663951130.

The spelling of 54081509 in words is "fifty-four million, eighty-one thousand, five hundred nine".