51481064 has 8 divisors (see below), whose sum is σ = 96527010. Its totient is φ = 25740528.

The previous prime is 51481063. The next prime is 51481069. The reversal of 51481064 is 46018415.

It can be written as a sum of positive squares in only one way, i.e., 28536964 + 22944100 = 5342^2 + 4790^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (51481063) 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 as a sum of consecutive naturals, namely, 3217559 + ... + 3217574.

Almost surely, 2^51481064 is an apocalyptic number.

It is an amenable number.

51481064 is a deficient number, since it is larger than the sum of its proper divisors (45045946).

51481064 is a wasteful number, since it uses less digits than its factorization.

51481064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6435139 (or 6435135 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 51481064 is about 7175.0305922693. The cubic root of 51481064 is about 372.0053377274.

Adding to 51481064 its reverse (46018415), we get a palindrome (97499479).

The spelling of 51481064 in words is "fifty-one million, four hundred eighty-one thousand, sixty-four".