51543442052 has 6 divisors (see below), whose sum is σ = 90201023598. Its totient is φ = 25771721024.

The previous prime is 51543442051. The next prime is 51543442061. The reversal of 51543442052 is 25024434515.

It can be written as a sum of positive squares in only one way, i.e., 51540804676 + 2637376 = 227026^2 + 1624^2 .

It is not an unprimeable number, because it can be changed into a prime (51543442051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6442930253 + ... + 6442930260.

It is an arithmetic number, because the mean of its divisors is an integer number (15033503933).

Almost surely, 2^51543442052 is an apocalyptic number.

It is an amenable number.

51543442052 is a deficient number, since it is larger than the sum of its proper divisors (38657581546).

51543442052 is a wasteful number, since it uses less digits than its factorization.

51543442052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12885860517 (or 12885860515 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 35.

Adding to 51543442052 its reverse (25024434515), we get a palindrome (76567876567).

The spelling of 51543442052 in words is "fifty-one billion, five hundred forty-three million, four hundred forty-two thousand, fifty-two".