51212160722 has 6 divisors (see below), whose sum is σ = 76818721143. Its totient is φ = 25605920342.

The previous prime is 51212160679. The next prime is 51212160737. The reversal of 51212160722 is 22706121215.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 25606080361 + 25606080361 = 160019^2 + 160019^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=160019.

It is a super-2 number, since 2×51212160722² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 240029 + ... + 400047.

Almost surely, 2^51212160722 is an apocalyptic number.

51212160722 is a deficient number, since it is larger than the sum of its proper divisors (25606560421).

51212160722 is an frugal number, since it uses more digits than its factorization.

51212160722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320040 (or 160021 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 29.

Adding to 51212160722 its reverse (22706121215), we get a palindrome (73918281937).

The spelling of 51212160722 in words is "fifty-one billion, two hundred twelve million, one hundred sixty thousand, seven hundred twenty-two".