51387941 has 8 divisors (see below), whose sum is σ = 56575200. Its totient is φ = 46286640.

The previous prime is 51387937. The next prime is 51387949. The reversal of 51387941 is 14978315.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51387941 - 2² = 51387937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51387895 and 51387904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51387949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20231 + ... + 22628.

It is an arithmetic number, because the mean of its divisors is an integer number (7071900).

Almost surely, 2^51387941 is an apocalyptic number.

It is an amenable number.

51387941 is a deficient number, since it is larger than the sum of its proper divisors (5187259).

51387941 is a wasteful number, since it uses less digits than its factorization.

51387941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42979.

The product of its digits is 30240, while the sum is 38.

The square root of 51387941 is about 7168.5382749902. The cubic root of 51387941 is about 371.7808981680.

The spelling of 51387941 in words is "fifty-one million, three hundred eighty-seven thousand, nine hundred forty-one".