54512009 has 4 divisors (see below), whose sum is σ = 54595140. Its totient is φ = 54428880.

The previous prime is 54511999. The next prime is 54512011. The reversal of 54512009 is 90021545.

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 50623225 + 3888784 = 7115^2 + 1972^2 .

It is a cyclic number.

It is not a de Polignac number, because 54512009 - 2¹⁶ = 54446473 is a prime.

It is a super-3 number, since 3×54512009³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54512039) 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, 40574 + ... + 41895.

It is an arithmetic number, because the mean of its divisors is an integer number (13648785).

Almost surely, 2^54512009 is an apocalyptic number.

It is an amenable number.

54512009 is a deficient number, since it is larger than the sum of its proper divisors (83131).

54512009 is an equidigital number, since it uses as much as digits as its factorization.

54512009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83130.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 54512009 is about 7383.2248374271. The cubic root of 54512009 is about 379.1671719082.

The spelling of 54512009 in words is "fifty-four million, five hundred twelve thousand, nine".