51089969 has 16 divisors (see below), whose sum is σ = 61243392. Its totient is φ = 41670288.

The previous prime is 51089959. The next prime is 51089971. The reversal of 51089969 is 96998015.

It is a cyclic number.

It is not a de Polignac number, because 51089969 - 2¹⁶ = 51024433 is a prime.

It is a super-2 number, since 2×51089969² = 5220369864841922, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51089959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35192 + ... + 36614.

It is an arithmetic number, because the mean of its divisors is an integer number (3827712).

Almost surely, 2^51089969 is an apocalyptic number.

It is an amenable number.

51089969 is a deficient number, since it is larger than the sum of its proper divisors (10153423).

51089969 is a wasteful number, since it uses less digits than its factorization.

51089969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1676.

The product of its (nonzero) digits is 174960, while the sum is 47.

The square root of 51089969 is about 7147.7247428815. The cubic root of 51089969 is about 371.0609166106.

The spelling of 51089969 in words is "fifty-one million, eighty-nine thousand, nine hundred sixty-nine".