54512509 has 2 divisors, whose sum is σ = 54512510. Its totient is φ = 54512508.

The previous prime is 54512453. The next prime is 54512537. The reversal of 54512509 is 90521545.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48372025 + 6140484 = 6955^2 + 2478^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54512509 is a prime.

It is a super-2 number, since 2×54512509² = 5943227274950162, which contains 22 as substring.

It is equal to p_3254845 and since 54512509 and 3254845 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54512209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27256254 + 27256255.

It is an arithmetic number, because the mean of its divisors is an integer number (27256255).

Almost surely, 2^54512509 is an apocalyptic number.

It is an amenable number.

54512509 is a deficient number, since it is larger than the sum of its proper divisors (1).

54512509 is an equidigital number, since it uses as much as digits as its factorization.

54512509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 54512509 is about 7383.2586978921. The cubic root of 54512509 is about 379.1683311819.

The spelling of 54512509 in words is "fifty-four million, five hundred twelve thousand, five hundred nine".