51721041 has 8 divisors (see below), whose sum is σ = 69385120. Its totient is φ = 34268832.

The previous prime is 51721031. The next prime is 51721091. The reversal of 51721041 is 14012715.

It is a happy number.

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

It is not a de Polignac number, because 51721041 - 2¹¹ = 51718993 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 = 51720999 and 51721017.

It is not an unprimeable number, because it can be changed into a prime (51721001) 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, 52396 + ... + 53373.

It is an arithmetic number, because the mean of its divisors is an integer number (8673140).

Almost surely, 2^51721041 is an apocalyptic number.

It is an amenable number.

51721041 is a deficient number, since it is larger than the sum of its proper divisors (17664079).

51721041 is a wasteful number, since it uses less digits than its factorization.

51721041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105935.

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 51721041 is about 7191.7342136650. The cubic root of 51721041 is about 372.5824714171.

Adding to 51721041 its reverse (14012715), we get a palindrome (65733756).

The spelling of 51721041 in words is "fifty-one million, seven hundred twenty-one thousand, forty-one".