51025621 has 8 divisors (see below), whose sum is σ = 53847200. Its totient is φ = 48217680.

The previous prime is 51025603. The next prime is 51025631. The reversal of 51025621 is 12652015.

51025621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 51025621 - 2⁷ = 51025493 is a prime.

It is a super-2 number, since 2×51025621² = 5207227996871282, 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 = 51025592 and 51025601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51025631) 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, 4810 + ... + 11188.

It is an arithmetic number, because the mean of its divisors is an integer number (6730900).

Almost surely, 2^51025621 is an apocalyptic number.

It is an amenable number.

51025621 is a deficient number, since it is larger than the sum of its proper divisors (2821579).

51025621 is a wasteful number, since it uses less digits than its factorization.

51025621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6819.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 51025621 is about 7143.2220321085. Note that the first 3 decimals coincide. The cubic root of 51025621 is about 370.9050669742.

Adding to 51025621 its reverse (12652015), we get a palindrome (63677636).

The spelling of 51025621 in words is "fifty-one million, twenty-five thousand, six hundred twenty-one".