51132228 has 48 divisors (see below), whose sum is σ = 137109504. Its totient is φ = 14528160.

The previous prime is 51132163. The next prime is 51132239. The reversal of 51132228 is 82223115.

It is a super-2 number, since 2×51132228² = 5229009480487968, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51132198 and 51132207.

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 15 ways as a sum of consecutive naturals, for example, 14451 + ... + 17637.

It is an arithmetic number, because the mean of its divisors is an integer number (2856448).

Almost surely, 2^51132228 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 51132228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68554752).

51132228 is an abundant number, since it is smaller than the sum of its proper divisors (85977276).

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

51132228 is a wasteful number, since it uses less digits than its factorization.

51132228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3392 (or 3390 counting only the distinct ones).

The product of its digits is 960, while the sum is 24.

The square root of 51132228 is about 7150.6802473611. The cubic root of 51132228 is about 371.1631959305.

It can be divided in two parts, 51132 and 228, that added together give a triangular number (51360 = T₃₂₀).

The spelling of 51132228 in words is "fifty-one million, one hundred thirty-two thousand, two hundred twenty-eight".