51226564 has 6 divisors (see below), whose sum is σ = 89646494. Its totient is φ = 25613280.

The previous prime is 51226561. The next prime is 51226579. The reversal of 51226564 is 46562215.

51226564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 30140100 + 21086464 = 5490^2 + 4592^2 .

It is not an unprimeable number, because it can be changed into a prime (51226561) 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 as a sum of consecutive naturals, namely, 6403317 + ... + 6403324.

Almost surely, 2^51226564 is an apocalyptic number.

It is an amenable number.

51226564 is a deficient number, since it is larger than the sum of its proper divisors (38419930).

51226564 is a wasteful number, since it uses less digits than its factorization.

51226564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12806645 (or 12806643 counting only the distinct ones).

The product of its digits is 14400, while the sum is 31.

The square root of 51226564 is about 7157.2735032273. The cubic root of 51226564 is about 371.3913139016.

Adding to 51226564 its reverse (46562215), we get a palindrome (97788779).

The spelling of 51226564 in words is "fifty-one million, two hundred twenty-six thousand, five hundred sixty-four".