51445232144 has 10 divisors (see below), whose sum is σ = 99675137310. Its totient is φ = 25722616064.

The previous prime is 51445232131. The next prime is 51445232171. The reversal of 51445232144 is 44123254415.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 29419110400 + 22026121744 = 171520^2 + 148412^2 .

It is a super-2 number, since 2×51445232144² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1607663489 + ... + 1607663520.

It is an arithmetic number, because the mean of its divisors is an integer number (9967513731).

Almost surely, 2^51445232144 is an apocalyptic number.

It is an amenable number.

51445232144 is a deficient number, since it is larger than the sum of its proper divisors (48229905166).

51445232144 is a wasteful number, since it uses less digits than its factorization.

51445232144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3215327017 (or 3215327011 counting only the distinct ones).

The product of its digits is 76800, while the sum is 35.

Adding to 51445232144 its reverse (44123254415), we get a palindrome (95568486559).

The spelling of 51445232144 in words is "fifty-one billion, four hundred forty-five million, two hundred thirty-two thousand, one hundred forty-four".