51671009 has 8 divisors (see below), whose sum is σ = 55719552. Its totient is φ = 47633040.

The previous prime is 51670991. The next prime is 51671021. The reversal of 51671009 is 90017615.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51671009 - 2⁸ = 51670753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51671099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9662 + ... + 14024.

It is an arithmetic number, because the mean of its divisors is an integer number (6964944).

Almost surely, 2^51671009 is an apocalyptic number.

It is an amenable number.

51671009 is a deficient number, since it is larger than the sum of its proper divisors (4048543).

51671009 is a wasteful number, since it uses less digits than its factorization.

51671009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5287.

The product of its (nonzero) digits is 1890, while the sum is 29.

The square root of 51671009 is about 7188.2549342660. The cubic root of 51671009 is about 372.4622942781.

The spelling of 51671009 in words is "fifty-one million, six hundred seventy-one thousand, nine".