51089643 has 48 divisors (see below), whose sum is σ = 85795200. Its totient is φ = 29797200.

The previous prime is 51089617. The next prime is 51089653. The reversal of 51089643 is 34698015.

51089643 is a `hidden beast` number, since 5 + 1 + 0 + 8 + 9 + 643 = 666.

51089643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51089643 - 2¹⁰ = 51088619 is a prime.

It is a super-2 number, since 2×51089643² = 5220303243734898, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 51089598 and 51089607.

It is not an unprimeable number, because it can be changed into a prime (51089653) 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 47 ways as a sum of consecutive naturals, for example, 285328 + ... + 285506.

It is an arithmetic number, because the mean of its divisors is an integer number (1787400).

Almost surely, 2^51089643 is an apocalyptic number.

51089643 is a deficient number, since it is larger than the sum of its proper divisors (34705557).

51089643 is a wasteful number, since it uses less digits than its factorization.

51089643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261 (or 224 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 51089643 is about 7147.7019383855. The cubic root of 51089643 is about 371.0601273747.

The spelling of 51089643 in words is "fifty-one million, eighty-nine thousand, six hundred forty-three".