51543144 has 24 divisors (see below), whose sum is σ = 139596210. Its totient is φ = 17181024.

The previous prime is 51543131. The next prime is 51543203. The reversal of 51543144 is 44134515.

It is a happy number.

51543144 is a `hidden beast` number, since 515 + 4 + 3 + 144 = 666.

It can be written as a sum of positive squares in only one way, i.e., 48860100 + 2683044 = 6990^2 + 1638^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 357867 + ... + 358010.

Almost surely, 2^51543144 is an apocalyptic number.

It is an amenable number.

51543144 is an abundant number, since it is smaller than the sum of its proper divisors (88053066).

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

51543144 is a wasteful number, since it uses less digits than its factorization.

51543144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715889 (or 715882 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 51543144 is about 7179.3554028199. The cubic root of 51543144 is about 372.1548089626.

Adding to 51543144 its reverse (44134515), we get a palindrome (95677659).

The spelling of 51543144 in words is "fifty-one million, five hundred forty-three thousand, one hundred forty-four".