51662421226 has 8 divisors (see below), whose sum is σ = 83454680484. Its totient is φ = 23844194400.

The previous prime is 51662421199. The next prime is 51662421247. The reversal of 51662421226 is 62212426615.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 43952703201 + 7709718025 = 209649^2 + 87805^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 993508075 + ... + 993508126.

Almost surely, 2^51662421226 is an apocalyptic number.

51662421226 is a deficient number, since it is larger than the sum of its proper divisors (31792259258).

51662421226 is a wasteful number, since it uses less digits than its factorization.

51662421226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1987016216.

The product of its digits is 69120, while the sum is 37.

The spelling of 51662421226 in words is "fifty-one billion, six hundred sixty-two million, four hundred twenty-one thousand, two hundred twenty-six".