51006109 has 24 divisors (see below), whose sum is σ = 65220768. Its totient is φ = 39443040.

The previous prime is 51006079. The next prime is 51006143. The reversal of 51006109 is 90160015.

It is not a de Polignac number, because 51006109 - 2⁹ = 51005597 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51006109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51006509) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 92974 + ... + 93520.

It is an arithmetic number, because the mean of its divisors is an integer number (2717532).

Almost surely, 2^51006109 is an apocalyptic number.

It is an amenable number.

51006109 is a deficient number, since it is larger than the sum of its proper divisors (14214659).

51006109 is a wasteful number, since it uses less digits than its factorization.

51006109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745 (or 738 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 51006109 is about 7141.8561312869. The cubic root of 51006109 is about 370.8577833926.

It can be divided in two parts, 51006 and 109, that added together give a palindrome (51115).

The spelling of 51006109 in words is "fifty-one million, six thousand, one hundred nine".