51316245 has 48 divisors (see below), whose sum is σ = 95696640. Its totient is φ = 25356672.

The previous prime is 51316241. The next prime is 51316259. The reversal of 51316245 is 54261315.

51316245 is a `hidden beast` number, since 5 + 1 + 31 + 624 + 5 = 666.

It is not a de Polignac number, because 51316245 - 2² = 51316241 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51316241) 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 47 ways as a sum of consecutive naturals, for example, 39547 + ... + 40823.

It is an arithmetic number, because the mean of its divisors is an integer number (1993680).

Almost surely, 2^51316245 is an apocalyptic number.

It is an amenable number.

51316245 is a deficient number, since it is larger than the sum of its proper divisors (44380395).

51316245 is a wasteful number, since it uses less digits than its factorization.

51316245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1354 (or 1351 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 51316245 is about 7163.5357889802. The cubic root of 51316245 is about 371.6079158902.

The spelling of 51316245 in words is "fifty-one million, three hundred sixteen thousand, two hundred forty-five".