51227889 has 4 divisors (see below), whose sum is σ = 68303856. Its totient is φ = 34151924.

The previous prime is 51227879. The next prime is 51227893. The reversal of 51227889 is 98872215.

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 51227889 - 2⁸ = 51227633 is a prime.

It is a super-2 number, since 2×51227889² = 5248593222792642, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51227889.

It is not an unprimeable number, because it can be changed into a prime (51227809) 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, 8537979 + ... + 8537984.

It is an arithmetic number, because the mean of its divisors is an integer number (17075964).

Almost surely, 2^51227889 is an apocalyptic number.

It is an amenable number.

51227889 is a deficient number, since it is larger than the sum of its proper divisors (17075967).

51227889 is a wasteful number, since it uses less digits than its factorization.

51227889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17075966.

The product of its digits is 80640, while the sum is 42.

The square root of 51227889 is about 7157.3660658094. The cubic root of 51227889 is about 371.3945159464.

The spelling of 51227889 in words is "fifty-one million, two hundred twenty-seven thousand, eight hundred eighty-nine".