51145012 has 6 divisors (see below), whose sum is σ = 89503778. Its totient is φ = 25572504.

The previous prime is 51145001. The next prime is 51145021. The reversal of 51145012 is 21054115.

It can be written as a sum of positive squares in only one way, i.e., 49196196 + 1948816 = 7014^2 + 1396^2 .

It is a congruent number.

It is an unprimeable number.

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, 6393123 + ... + 6393130.

Almost surely, 2^51145012 is an apocalyptic number.

It is an amenable number.

51145012 is a deficient number, since it is larger than the sum of its proper divisors (38358766).

51145012 is a wasteful number, since it uses less digits than its factorization.

51145012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12786257 (or 12786255 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 51145012 is about 7151.5740924638. The cubic root of 51145012 is about 371.1941259010.

Adding to 51145012 its reverse (21054115), we get a palindrome (72199127).

The spelling of 51145012 in words is "fifty-one million, one hundred forty-five thousand, twelve".