51040320106 has 4 divisors (see below), whose sum is σ = 76560480162. Its totient is φ = 25520160052.

The previous prime is 51040320083. The next prime is 51040320151. The reversal of 51040320106 is 60102304015.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 49157541225 + 1882778881 = 221715^2 + 43391^2 .

It is a super-2 number, since 2×51040320106² (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, 12760080025 + ... + 12760080028.

Almost surely, 2^51040320106 is an apocalyptic number.

51040320106 is a deficient number, since it is larger than the sum of its proper divisors (25520160056).

51040320106 is a wasteful number, since it uses less digits than its factorization.

51040320106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25520160055.

The product of its (nonzero) digits is 720, while the sum is 22.

The spelling of 51040320106 in words is "fifty-one billion, forty million, three hundred twenty thousand, one hundred six".