51060221 has 8 divisors (see below), whose sum is σ = 52529664. Its totient is φ = 49603680.

The previous prime is 51060209. The next prime is 51060227. The reversal of 51060221 is 12206015.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51060221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51060221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51060227) 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, 5105 + ... + 11321.

It is an arithmetic number, because the mean of its divisors is an integer number (6566208).

Almost surely, 2^51060221 is an apocalyptic number.

It is an amenable number.

51060221 is a deficient number, since it is larger than the sum of its proper divisors (1469443).

51060221 is a wasteful number, since it uses less digits than its factorization.

51060221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6451.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 51060221 is about 7145.6434979643. The cubic root of 51060221 is about 370.9888837930.

Adding to 51060221 its reverse (12206015), we get a palindrome (63266236).

The spelling of 51060221 in words is "fifty-one million, sixty thousand, two hundred twenty-one".