51843641 has 4 divisors (see below), whose sum is σ = 52060800. Its totient is φ = 51626484.

The previous prime is 51843637. The next prime is 51843653. The reversal of 51843641 is 14634815.

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.

It is a cyclic number.

It is not a de Polignac number, because 51843641 - 2² = 51843637 is a prime.

It is a super-2 number, since 2×51843641² = 5375526224273762, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51843598 and 51843607.

It is not an unprimeable number, because it can be changed into a prime (51843661) 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, 108221 + ... + 108698.

It is an arithmetic number, because the mean of its divisors is an integer number (13015200).

Almost surely, 2^51843641 is an apocalyptic number.

It is an amenable number.

51843641 is a deficient number, since it is larger than the sum of its proper divisors (217159).

51843641 is a wasteful number, since it uses less digits than its factorization.

51843641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217158.

The product of its digits is 11520, while the sum is 32.

The square root of 51843641 is about 7200.2528427827. The cubic root of 51843641 is about 372.8766300113.

The spelling of 51843641 in words is "fifty-one million, eight hundred forty-three thousand, six hundred forty-one".