51381941 has 8 divisors (see below), whose sum is σ = 55390944. Its totient is φ = 47381040.

The previous prime is 51381929. The next prime is 51381949. The reversal of 51381941 is 14918315.

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 51381941 - 2¹⁴ = 51365557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51381898 and 51381907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51381949) 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, 20486 + ... + 22856.

It is an arithmetic number, because the mean of its divisors is an integer number (6923868).

Almost surely, 2^51381941 is an apocalyptic number.

It is an amenable number.

51381941 is a deficient number, since it is larger than the sum of its proper divisors (4009003).

51381941 is a wasteful number, since it uses less digits than its factorization.

51381941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4051.

The product of its digits is 4320, while the sum is 32.

The square root of 51381941 is about 7168.1197674146. The cubic root of 51381941 is about 371.7664280273.

The spelling of 51381941 in words is "fifty-one million, three hundred eighty-one thousand, nine hundred forty-one".