51407245 has 16 divisors (see below), whose sum is σ = 63653040. Its totient is φ = 39826944.

The previous prime is 51407243. The next prime is 51407249. The reversal of 51407245 is 54270415.

It can be written as a sum of positive squares in 8 ways, for example, as 1887876 + 49519369 = 1374^2 + 7037^2 .

It is a cyclic number.

It is not a de Polignac number, because 51407245 - 2¹ = 51407243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51407243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49249 + ... + 50281.

It is an arithmetic number, because the mean of its divisors is an integer number (3978315).

Almost surely, 2^51407245 is an apocalyptic number.

It is an amenable number.

51407245 is a deficient number, since it is larger than the sum of its proper divisors (12245795).

51407245 is a wasteful number, since it uses less digits than its factorization.

51407245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1344.

The product of its (nonzero) digits is 5600, while the sum is 28.

The square root of 51407245 is about 7169.8845876346. The cubic root of 51407245 is about 371.8274457940.

The spelling of 51407245 in words is "fifty-one million, four hundred seven thousand, two hundred forty-five".