51123234212 has 6 divisors (see below), whose sum is σ = 89465659878. Its totient is φ = 25561617104.

The previous prime is 51123234209. The next prime is 51123234233. The reversal of 51123234212 is 21243232115.

It can be written as a sum of positive squares in only one way, i.e., 51051594916 + 71639296 = 225946^2 + 8464^2 .

It is a super-2 number, since 2×51123234212² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6390404273 + ... + 6390404280.

It is an arithmetic number, because the mean of its divisors is an integer number (14910943313).

Almost surely, 2^51123234212 is an apocalyptic number.

It is an amenable number.

51123234212 is a deficient number, since it is larger than the sum of its proper divisors (38342425666).

51123234212 is a wasteful number, since it uses less digits than its factorization.

51123234212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12780808557 (or 12780808555 counting only the distinct ones).

The product of its digits is 2880, while the sum is 26.

Adding to 51123234212 its reverse (21243232115), we get a palindrome (72366466327).

The spelling of 51123234212 in words is "fifty-one billion, one hundred twenty-three million, two hundred thirty-four thousand, two hundred twelve".