51145244 has 6 divisors (see below), whose sum is σ = 89504184. Its totient is φ = 25572620.

The previous prime is 51145229. The next prime is 51145249. The reversal of 51145244 is 44254115.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51145249) 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, 6393152 + ... + 6393159.

It is an arithmetic number, because the mean of its divisors is an integer number (14917364).

Almost surely, 2^51145244 is an apocalyptic number.

It is an amenable number.

51145244 is a deficient number, since it is larger than the sum of its proper divisors (38358940).

51145244 is a wasteful number, since it uses less digits than its factorization.

51145244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12786315 (or 12786313 counting only the distinct ones).

The product of its digits is 3200, while the sum is 26.

The square root of 51145244 is about 7151.5903126507. The cubic root of 51145244 is about 371.1946871608.

Adding to 51145244 its reverse (44254115), we get a palindrome (95399359).

The spelling of 51145244 in words is "fifty-one million, one hundred forty-five thousand, two hundred forty-four".