51433228 has 144 divisors (see below), whose sum is σ = 128701440. Its totient is φ = 17487360.

The previous prime is 51433169. The next prime is 51433231. The reversal of 51433228 is 82233415.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 51433196 and 51433205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1094301 + ... + 1094347.

It is an arithmetic number, because the mean of its divisors is an integer number (893760).

Almost surely, 2^51433228 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51433228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64350720).

51433228 is an abundant number, since it is smaller than the sum of its proper divisors (77268212).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51433228 is a wasteful number, since it uses less digits than its factorization.

51433228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116 (or 103 counting only the distinct ones).

The product of its digits is 5760, while the sum is 28.

The square root of 51433228 is about 7171.6963125888. The cubic root of 51433228 is about 371.8900800607.

It can be divided in two parts, 51 and 433228, that multiplied together give a triangular number (22094628 = T₆₆₄₇).

The spelling of 51433228 in words is "fifty-one million, four hundred thirty-three thousand, two hundred twenty-eight".