51507073 has 4 divisors (see below), whose sum is σ = 51697408. Its totient is φ = 51316740.

The previous prime is 51507067. The next prime is 51507083. The reversal of 51507073 is 37070515.

51507073 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51507073 - 2⁵ = 51507041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51507013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94761 + ... + 95302.

It is an arithmetic number, because the mean of its divisors is an integer number (12924352).

Almost surely, 2^51507073 is an apocalyptic number.

It is an amenable number.

51507073 is a deficient number, since it is larger than the sum of its proper divisors (190335).

51507073 is a wasteful number, since it uses less digits than its factorization.

51507073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190334.

The product of its (nonzero) digits is 3675, while the sum is 28.

The square root of 51507073 is about 7176.8428295456. The cubic root of 51507073 is about 372.0679747253.

Adding to 51507073 its reverse (37070515), we get a palindrome (88577588).

The spelling of 51507073 in words is "fifty-one million, five hundred seven thousand, seventy-three".