51091802 has 8 divisors (see below), whose sum is σ = 77152500. Its totient is φ = 25374304.

The previous prime is 51091793. The next prime is 51091829. The reversal of 51091802 is 20819015.

It is a happy number.

51091802 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 50708641 + 383161 = 7121^2 + 619^2 .

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

It is a super-2 number, since 2×51091802² = 5220744463214408, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85427 + ... + 86022.

Almost surely, 2^51091802 is an apocalyptic number.

51091802 is a deficient number, since it is larger than the sum of its proper divisors (26060698).

51091802 is a wasteful number, since it uses less digits than its factorization.

51091802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171600.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 51091802 is about 7147.8529643523. The cubic root of 51091802 is about 371.0653541845.

The spelling of 51091802 in words is "fifty-one million, ninety-one thousand, eight hundred two".