51343231234 has 4 divisors (see below), whose sum is σ = 77014846854. Its totient is φ = 25671615616.

The previous prime is 51343231231. The next prime is 51343231259. The reversal of 51343231234 is 43213234315.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43213234315 = 5 ⋅8642646863.

It can be written as a sum of positive squares in only one way, i.e., 40118888209 + 11224343025 = 200297^2 + 105945^2 .

It is a super-2 number, since 2×51343231234² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51343231196 and 51343231205.

It is not an unprimeable number, because it can be changed into a prime (51343231231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12835807807 + ... + 12835807810.

Almost surely, 2^51343231234 is an apocalyptic number.

51343231234 is a deficient number, since it is larger than the sum of its proper divisors (25671615620).

51343231234 is a wasteful number, since it uses less digits than its factorization.

51343231234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25671615619.

The product of its digits is 25920, while the sum is 31.

Adding to 51343231234 its reverse (43213234315), we get a palindrome (94556465549).

The spelling of 51343231234 in words is "fifty-one billion, three hundred forty-three million, two hundred thirty-one thousand, two hundred thirty-four".