51319807 has 12 divisors (see below), whose sum is σ = 65126376. Its totient is φ = 39989040.

The previous prime is 51319799. The next prime is 51319819. The reversal of 51319807 is 70891315.

It is a happy number.

It is not a de Polignac number, because 51319807 - 2³ = 51319799 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51319867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47068 + ... + 48145.

It is an arithmetic number, because the mean of its divisors is an integer number (5427198).

Almost surely, 2^51319807 is an apocalyptic number.

51319807 is a deficient number, since it is larger than the sum of its proper divisors (13806569).

51319807 is a wasteful number, since it uses less digits than its factorization.

51319807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95238 (or 95231 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 34.

The square root of 51319807 is about 7163.7844049078. The cubic root of 51319807 is about 371.6165137963.

The spelling of 51319807 in words is "fifty-one million, three hundred nineteen thousand, eight hundred seven".