51746009 has 16 divisors (see below), whose sum is σ = 61392000. Its totient is φ = 43584912.

The previous prime is 51746003. The next prime is 51746033. The reversal of 51746009 is 90064715.

It is a happy number.

51746009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51746009 - 2⁸ = 51745753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51746003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18959 + ... + 21515.

It is an arithmetic number, because the mean of its divisors is an integer number (3837000).

Almost surely, 2^51746009 is an apocalyptic number.

51746009 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

It is an amenable number.

51746009 is a deficient number, since it is larger than the sum of its proper divisors (9645991).

51746009 is an equidigital number, since it uses as much as digits as its factorization.

51746009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2637 (or 2623 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 51746009 is about 7193.4698859452. The cubic root of 51746009 is about 372.6424157031.

The spelling of 51746009 in words is "fifty-one million, seven hundred forty-six thousand, nine".