51001144 has 8 divisors (see below), whose sum is σ = 95627160. Its totient is φ = 25500568.

The previous prime is 51001141. The next prime is 51001151. The reversal of 51001144 is 44110015.

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

It is a super-2 number, since 2×51001144² = 5202233378617472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51001141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3187564 + ... + 3187579.

It is an arithmetic number, because the mean of its divisors is an integer number (11953395).

Almost surely, 2^51001144 is an apocalyptic number.

It is an amenable number.

51001144 is a deficient number, since it is larger than the sum of its proper divisors (44626016).

51001144 is a wasteful number, since it uses less digits than its factorization.

51001144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6375149 (or 6375145 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 51001144 is about 7141.5085241145. The cubic root of 51001144 is about 370.8457497449.

Adding to 51001144 its reverse (44110015), we get a palindrome (95111159).

The spelling of 51001144 in words is "fifty-one million, one thousand, one hundred forty-four".