51472609 has 4 divisors (see below), whose sum is σ = 51488404. Its totient is φ = 51456816.

The previous prime is 51472601. The next prime is 51472627. The reversal of 51472609 is 90627415.

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 7290000 + 44182609 = 2700^2 + 6647^2 .

It is a cyclic number.

It is not a de Polignac number, because 51472609 - 2³ = 51472601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51472601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1002 + ... + 10195.

It is an arithmetic number, because the mean of its divisors is an integer number (12872101).

Almost surely, 2^51472609 is an apocalyptic number.

It is an amenable number.

51472609 is a deficient number, since it is larger than the sum of its proper divisors (15795).

51472609 is a wasteful number, since it uses less digits than its factorization.

51472609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15794.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 51472609 is about 7174.4413719815. The cubic root of 51472609 is about 371.9849711622.

The spelling of 51472609 in words is "fifty-one million, four hundred seventy-two thousand, six hundred nine".