51125431443266 has 4 divisors (see below), whose sum is σ = 76688147164902. Its totient is φ = 25562715721632.

The previous prime is 51125431443253. The next prime is 51125431443269. The reversal of 51125431443266 is 66234413452115.

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., 35369128368025 + 15756303075241 = 5947195^2 + 3969421^2 .

It is a super-2 number, since 2×51125431443266² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51125431443266.

It is not an unprimeable number, because it can be changed into a prime (51125431443269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12781357860815 + ... + 12781357860818.

Almost surely, 2^{51125431443266} is an apocalyptic number.

51125431443266 is a deficient number, since it is larger than the sum of its proper divisors (25562715721636).

51125431443266 is a wasteful number, since it uses less digits than its factorization.

51125431443266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25562715721635.

The product of its digits is 2073600, while the sum is 47.

The spelling of 51125431443266 in words is "fifty-one trillion, one hundred twenty-five billion, four hundred thirty-one million, four hundred forty-three thousand, two hundred sixty-six".