51711009 has 16 divisors (see below), whose sum is σ = 78998400. Its totient is φ = 29473920.

The previous prime is 51711001. The next prime is 51711013. The reversal of 51711009 is 90011715.

It is not a de Polignac number, because 51711009 - 2³ = 51711001 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51711009.

It is not an unprimeable number, because it can be changed into a prime (51711001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5917 + ... + 11765.

It is an arithmetic number, because the mean of its divisors is an integer number (4937400).

Almost surely, 2^51711009 is an apocalyptic number.

It is an amenable number.

51711009 is a deficient number, since it is larger than the sum of its proper divisors (27287391).

51711009 is a wasteful number, since it uses less digits than its factorization.

51711009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6280.

The product of its (nonzero) digits is 315, while the sum is 24.

The square root of 51711009 is about 7191.0367124636. The cubic root of 51711009 is about 372.5583807120.

The spelling of 51711009 in words is "fifty-one million, seven hundred eleven thousand, nine".