51040917 has 6 divisors (see below), whose sum is σ = 73725782. Its totient is φ = 34027272.

The previous prime is 51040889. The next prime is 51040931. The reversal of 51040917 is 71904015.

It can be written as a sum of positive squares in only one way, i.e., 44275716 + 6765201 = 6654^2 + 2601^2 .

It is not a de Polignac number, because 51040917 - 2⁶ = 51040853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51040217) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2835598 + ... + 2835615.

Almost surely, 2^51040917 is an apocalyptic number.

It is an amenable number.

51040917 is a deficient number, since it is larger than the sum of its proper divisors (22684865).

51040917 is a wasteful number, since it uses less digits than its factorization.

51040917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5671219 (or 5671216 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 51040917 is about 7144.2926171875. The cubic root of 51040917 is about 370.9421254622.

The spelling of 51040917 in words is "fifty-one million, forty thousand, nine hundred seventeen".