51466609 has 4 divisors (see below), whose sum is σ = 51521904. Its totient is φ = 51411316.

The previous prime is 51466607. The next prime is 51466631. The reversal of 51466609 is 90666415.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51466609 - 2¹ = 51466607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51466601) 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, 26227 + ... + 28120.

It is an arithmetic number, because the mean of its divisors is an integer number (12880476).

Almost surely, 2^51466609 is an apocalyptic number.

It is an amenable number.

51466609 is a deficient number, since it is larger than the sum of its proper divisors (55295).

51466609 is an equidigital number, since it uses as much as digits as its factorization.

51466609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55294.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 51466609 is about 7174.0232087720. The cubic root of 51466609 is about 371.9705168949.

The spelling of 51466609 in words is "fifty-one million, four hundred sixty-six thousand, six hundred nine".