51022224 has 120 divisors (see below), whose sum is σ = 161677152. Its totient is φ = 15448320.

The previous prime is 51022217. The next prime is 51022241. The reversal of 51022224 is 42222015.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 51022197 and 51022206.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42172 + ... + 43364.

Almost surely, 2^51022224 is an apocalyptic number.

51022224 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51022224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80838576).

51022224 is an abundant number, since it is smaller than the sum of its proper divisors (110654928).

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

51022224 is a wasteful number, since it uses less digits than its factorization.

51022224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1227 (or 1209 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 51022224 is about 7142.9842502976. The cubic root of 51022224 is about 370.8968358644.

Adding to 51022224 its reverse (42222015), we get a palindrome (93244239).

The spelling of 51022224 in words is "fifty-one million, twenty-two thousand, two hundred twenty-four".