51091937 has 16 divisors (see below), whose sum is σ = 57426432. Its totient is φ = 45135360.

The previous prime is 51091921. The next prime is 51091949. The reversal of 51091937 is 73919015.

51091937 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 51091937 - 2⁴ = 51091921 is a prime.

It is a super-2 number, since 2×51091937² = 5220772052823938, which contains 22 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51091897 and 51091906.

It is not an unprimeable number, because it can be changed into a prime (51091967) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 38438 + ... + 39744.

It is an arithmetic number, because the mean of its divisors is an integer number (3589152).

Almost surely, 2^51091937 is an apocalyptic number.

It is an amenable number.

51091937 is a deficient number, since it is larger than the sum of its proper divisors (6334495).

51091937 is a wasteful number, since it uses less digits than its factorization.

51091937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1448.

The product of its (nonzero) digits is 8505, while the sum is 35.

The square root of 51091937 is about 7147.8624077412. The cubic root of 51091937 is about 371.0656810065.

The spelling of 51091937 in words is "fifty-one million, ninety-one thousand, nine hundred thirty-seven".