51751349 has 12 divisors (see below), whose sum is σ = 59338116. Its totient is φ = 44957952.

The previous prime is 51751331. The next prime is 51751351. The reversal of 51751349 is 94315715.

It can be written as a sum of positive squares in 6 ways, for example, as 12100 + 51739249 = 110^2 + 7193^2 .

It is not a de Polignac number, because 51751349 - 2²⁴ = 34974133 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51751549) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6134 + ... + 11879.

It is an arithmetic number, because the mean of its divisors is an integer number (4944843).

Almost surely, 2^51751349 is an apocalyptic number.

It is an amenable number.

51751349 is a deficient number, since it is larger than the sum of its proper divisors (7586767).

51751349 is a wasteful number, since it uses less digits than its factorization.

51751349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18056 (or 18043 counting only the distinct ones).

The product of its digits is 18900, while the sum is 35.

The square root of 51751349 is about 7193.8410463396. The cubic root of 51751349 is about 372.6552337097.

The spelling of 51751349 in words is "fifty-one million, seven hundred fifty-one thousand, three hundred forty-nine".