51083221 has 4 divisors (see below), whose sum is σ = 58380832. Its totient is φ = 43785612.

The previous prime is 51083189. The next prime is 51083231. The reversal of 51083221 is 12238015.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51083221 - 2⁵ = 51083189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51083192 and 51083201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51083231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3648795 + ... + 3648808.

It is an arithmetic number, because the mean of its divisors is an integer number (14595208).

Almost surely, 2^51083221 is an apocalyptic number.

It is an amenable number.

51083221 is a deficient number, since it is larger than the sum of its proper divisors (7297611).

51083221 is an equidigital number, since it uses as much as digits as its factorization.

51083221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7297610.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 51083221 is about 7147.2526889708. The cubic root of 51083221 is about 371.0445792267.

The spelling of 51083221 in words is "fifty-one million, eighty-three thousand, two hundred twenty-one".