51241021 has 8 divisors (see below), whose sum is σ = 56529144. Its totient is φ = 46145280.

The previous prime is 51241019. The next prime is 51241027. The reversal of 51241021 is 12014215.

51241021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 617796 + 50623225 = 786^2 + 7115^2 .

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 51241021 - 2¹ = 51241019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51240986 and 51241004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51241027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47536 + ... + 48601.

It is an arithmetic number, because the mean of its divisors is an integer number (7066143).

Almost surely, 2^51241021 is an apocalyptic number.

It is an amenable number.

51241021 is a deficient number, since it is larger than the sum of its proper divisors (5288123).

51241021 is a wasteful number, since it uses less digits than its factorization.

51241021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96191.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 51241021 is about 7158.2833836053. The cubic root of 51241021 is about 371.4262482455.

Adding to 51241021 its reverse (12014215), we get a palindrome (63255236).

The spelling of 51241021 in words is "fifty-one million, two hundred forty-one thousand, twenty-one".