51846643 has 4 divisors (see below), whose sum is σ = 52023888. Its totient is φ = 51669400.

The previous prime is 51846637. The next prime is 51846647. The reversal of 51846643 is 34664815.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51846643 - 2⁹ = 51846131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51846647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88183 + ... + 88768.

It is an arithmetic number, because the mean of its divisors is an integer number (13005972).

Almost surely, 2^51846643 is an apocalyptic number.

51846643 is a deficient number, since it is larger than the sum of its proper divisors (177245).

51846643 is a wasteful number, since it uses less digits than its factorization.

51846643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177244.

The product of its digits is 69120, while the sum is 37.

The square root of 51846643 is about 7200.4613046665. The cubic root of 51846643 is about 372.8838269983.

The spelling of 51846643 in words is "fifty-one million, eight hundred forty-six thousand, six hundred forty-three".