51220752 has 60 divisors (see below), whose sum is σ = 145459440. Its totient is φ = 15519680.

The previous prime is 51220739. The next prime is 51220759. The reversal of 51220752 is 25702215.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (51220759) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1399 + ... + 10217.

It is an arithmetic number, because the mean of its divisors is an integer number (2424324).

Almost surely, 2^51220752 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 51220752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72729720).

51220752 is an abundant number, since it is smaller than the sum of its proper divisors (94238688).

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

51220752 is a wasteful number, since it uses less digits than its factorization.

51220752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8852 (or 8835 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 51220752 is about 7156.8674711776. The cubic root of 51220752 is about 371.3772677520.

Adding to 51220752 its reverse (25702215), we get a palindrome (76922967).

The spelling of 51220752 in words is "fifty-one million, two hundred twenty thousand, seven hundred fifty-two".