51222024 has 128 divisors (see below), whose sum is σ = 171264000. Its totient is φ = 13856832.

The previous prime is 51222001. The next prime is 51222047. The reversal of 51222024 is 42022215.

It is an interprime number because it is at equal distance from previous prime (51222001) and next prime (51222047).

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 = 51221988 and 51222006.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27837 + ... + 29619.

It is an arithmetic number, because the mean of its divisors is an integer number (1338000).

Almost surely, 2^51222024 is an apocalyptic number.

51222024 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 51222024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85632000).

51222024 is an abundant number, since it is smaller than the sum of its proper divisors (120041976).

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

51222024 is a wasteful number, since it uses less digits than its factorization.

51222024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1824 (or 1814 counting only the distinct ones).

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

The square root of 51222024 is about 7156.9563363206. The cubic root of 51222024 is about 371.3803419485.

Adding to 51222024 its reverse (42022215), we get a palindrome (93244239).

The spelling of 51222024 in words is "fifty-one million, two hundred twenty-two thousand, twenty-four".