51609941 has 4 divisors (see below), whose sum is σ = 51624384. Its totient is φ = 51595500.

The previous prime is 51609923. The next prime is 51609973. The reversal of 51609941 is 14990615.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 51609941 - 2¹⁸ = 51347797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51609911) 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 3 ways as a sum of consecutive naturals, for example, 2516 + ... + 10466.

It is an arithmetic number, because the mean of its divisors is an integer number (12906096).

Almost surely, 2^51609941 is an apocalyptic number.

It is an amenable number.

51609941 is a deficient number, since it is larger than the sum of its proper divisors (14443).

51609941 is an equidigital number, since it uses as much as digits as its factorization.

51609941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14442.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 51609941 is about 7184.0059159218. The cubic root of 51609941 is about 372.3155034283.

The spelling of 51609941 in words is "fifty-one million, six hundred nine thousand, nine hundred forty-one".