51022128 has 30 divisors (see below), whose sum is σ = 131935132. Its totient is φ = 16990880.

The previous prime is 51022067. The next prime is 51022129. The reversal of 51022128 is 82122015.

It is a happy number.

It is a Smith number, since the sum of its digits (21) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (51022129) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 48973 + ... + 50003.

Almost surely, 2^51022128 is an apocalyptic number.

It is an amenable number.

51022128 is an abundant number, since it is smaller than the sum of its proper divisors (80913004).

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

51022128 is an equidigital number, since it uses as much as digits as its factorization.

51022128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2073 (or 1036 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 51022128 is about 7142.9775304140. The cubic root of 51022128 is about 370.8966032460.

The spelling of 51022128 in words is "fifty-one million, twenty-two thousand, one hundred twenty-eight".