51224388 has 12 divisors (see below), whose sum is σ = 119523600. Its totient is φ = 17074792.

The previous prime is 51224359. The next prime is 51224389. The reversal of 51224388 is 88342215.

51224388 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (51224389) 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 3 ways as a sum of consecutive naturals, for example, 2134338 + ... + 2134361.

It is an arithmetic number, because the mean of its divisors is an integer number (9960300).

Almost surely, 2^51224388 is an apocalyptic number.

It is an amenable number.

51224388 is an abundant number, since it is smaller than the sum of its proper divisors (68299212).

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

51224388 is a wasteful number, since it uses less digits than its factorization.

51224388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4268706 (or 4268704 counting only the distinct ones).

The product of its digits is 15360, while the sum is 33.

The square root of 51224388 is about 7157.1214884198. The cubic root of 51224388 is about 371.3860551786.

The spelling of 51224388 in words is "fifty-one million, two hundred twenty-four thousand, three hundred eighty-eight".