51143444 has 48 divisors (see below), whose sum is σ = 103130496. Its totient is φ = 21964800.

The previous prime is 51143431. The next prime is 51143447. The reversal of 51143444 is 44434115.

It is a happy number.

It is a super-3 number, since 3×51143444³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51143447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97904 + ... + 98424.

It is an arithmetic number, because the mean of its divisors is an integer number (2148552).

Almost surely, 2^51143444 is an apocalyptic number.

It is an amenable number.

51143444 is an abundant number, since it is smaller than the sum of its proper divisors (51987052).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51143444 is a wasteful number, since it uses less digits than its factorization.

51143444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656 (or 654 counting only the distinct ones).

The product of its digits is 3840, while the sum is 26.

The square root of 51143444 is about 7151.4644654085. The cubic root of 51143444 is about 371.1903325149.

Adding to 51143444 its reverse (44434115), we get a palindrome (95577559).

It can be divided in two parts, 5114 and 3444, that added together give a palindrome (8558).

The spelling of 51143444 in words is "fifty-one million, one hundred forty-three thousand, four hundred forty-four".