51166435451 has 4 divisors (see below), whose sum is σ = 51635852400. Its totient is φ = 50697018504.

The previous prime is 51166435387. The next prime is 51166435469. The reversal of 51166435451 is 15453466115.

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

It is a cyclic number.

It is not a de Polignac number, because 51166435451 - 2⁶ = 51166435387 is a prime.

It is a super-2 number, since 2×51166435451² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51166435399 and 51166435408.

It is not an unprimeable number, because it can be changed into a prime (51166435751) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234708311 + ... + 234708528.

It is an arithmetic number, because the mean of its divisors is an integer number (12908963100).

Almost surely, 2^51166435451 is an apocalyptic number.

51166435451 is a deficient number, since it is larger than the sum of its proper divisors (469416949).

51166435451 is a wasteful number, since it uses less digits than its factorization.

51166435451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469416948.

The product of its digits is 216000, while the sum is 41.

The spelling of 51166435451 in words is "fifty-one billion, one hundred sixty-six million, four hundred thirty-five thousand, four hundred fifty-one".