51567220 has 48 divisors (see below), whose sum is σ = 113783040. Its totient is φ = 19603584.

The previous prime is 51567203. The next prime is 51567227. The reversal of 51567220 is 2276515.

51567220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51567227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38197 + ... + 39523.

It is an arithmetic number, because the mean of its divisors is an integer number (2370480).

Almost surely, 2^51567220 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 51567220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56891520).

51567220 is an abundant number, since it is smaller than the sum of its proper divisors (62215820).

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

51567220 is a wasteful number, since it uses less digits than its factorization.

51567220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1432 (or 1430 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 51567220 is about 7181.0319592660. The cubic root of 51567220 is about 372.2127449218.

The spelling of 51567220 in words is "fifty-one million, five hundred sixty-seven thousand, two hundred twenty".