51668941 has 4 divisors (see below), whose sum is σ = 52040800. Its totient is φ = 51297084.

The previous prime is 51668927. The next prime is 51668977. The reversal of 51668941 is 14986615.

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 a de Polignac number, because none of the positive numbers 2^k-51668941 is a prime.

It is a super-2 number, since 2×51668941² = 5339358928122962, 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 = 51668894 and 51668903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51668921) 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, 185721 + ... + 185998.

It is an arithmetic number, because the mean of its divisors is an integer number (13010200).

Almost surely, 2^51668941 is an apocalyptic number.

It is an amenable number.

51668941 is a deficient number, since it is larger than the sum of its proper divisors (371859).

51668941 is a wasteful number, since it uses less digits than its factorization.

51668941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371858.

The product of its digits is 51840, while the sum is 40.

The square root of 51668941 is about 7188.1110870659. Note that the first 3 decimals coincide. The cubic root of 51668941 is about 372.4573252615.

The spelling of 51668941 in words is "fifty-one million, six hundred sixty-eight thousand, nine hundred forty-one".