51423133442 has 16 divisors (see below), whose sum is σ = 79821660600. Its totient is φ = 24816516480.

The previous prime is 51423133427. The next prime is 51423133477. The reversal of 51423133442 is 24433132415.

It can be written as a sum of positive squares in 4 ways, for example, as 39298701121 + 12124432321 = 198239^2 + 110111^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51423133399 and 51423133408.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22892 + ... + 321512.

Almost surely, 2^51423133442 is an apocalyptic number.

51423133442 is a deficient number, since it is larger than the sum of its proper divisors (28398527158).

51423133442 is a wasteful number, since it uses less digits than its factorization.

51423133442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301621.

The product of its digits is 34560, while the sum is 32.

Adding to 51423133442 its reverse (24433132415), we get a palindrome (75856265857).

The spelling of 51423133442 in words is "fifty-one billion, four hundred twenty-three million, one hundred thirty-three thousand, four hundred forty-two".