51321473 has 12 divisors (see below), whose sum is σ = 60424560. Its totient is φ = 43456392.

The previous prime is 51321469. The next prime is 51321499. The reversal of 51321473 is 37412315.

It is not a de Polignac number, because 51321473 - 2² = 51321469 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51321173) 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 11 ways as a sum of consecutive naturals, for example, 2243 + ... + 10376.

It is an arithmetic number, because the mean of its divisors is an integer number (5035380).

Almost surely, 2^51321473 is an apocalyptic number.

It is an amenable number.

51321473 is a deficient number, since it is larger than the sum of its proper divisors (9103087).

51321473 is a wasteful number, since it uses less digits than its factorization.

51321473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12716 (or 12709 counting only the distinct ones).

The product of its digits is 2520, while the sum is 26.

The square root of 51321473 is about 7163.9006832870. The cubic root of 51321473 is about 371.6205350274.

Adding to 51321473 its reverse (37412315), we get a palindrome (88733788).

The spelling of 51321473 in words is "fifty-one million, three hundred twenty-one thousand, four hundred seventy-three".