51219227 has 4 divisors (see below), whose sum is σ = 51622656. Its totient is φ = 50815800.

The previous prime is 51219169. The next prime is 51219263. The reversal of 51219227 is 72291215.

51219227 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72291215 = 5 ⋅14458243.

It is a cyclic number.

It is not a de Polignac number, because 51219227 - 2⁶ = 51219163 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51219227.

It is not an unprimeable number, because it can be changed into a prime (51210227) 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 3 ways as a sum of consecutive naturals, for example, 201524 + ... + 201777.

It is an arithmetic number, because the mean of its divisors is an integer number (12905664).

Almost surely, 2^51219227 is an apocalyptic number.

51219227 is a deficient number, since it is larger than the sum of its proper divisors (403429).

51219227 is a wasteful number, since it uses less digits than its factorization.

51219227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403428.

The product of its digits is 2520, while the sum is 29.

The square root of 51219227 is about 7156.7609293590. The cubic root of 51219227 is about 371.3735820326.

The spelling of 51219227 in words is "fifty-one million, two hundred nineteen thousand, two hundred twenty-seven".