51242188 has 24 divisors (see below), whose sum is σ = 95281200. Its totient is φ = 24067008.

The previous prime is 51242167. The next prime is 51242189. The reversal of 51242188 is 88124215.

51242188 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (51242189) 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 7 ways as a sum of consecutive naturals, for example, 1678 + ... + 10261.

It is an arithmetic number, because the mean of its divisors is an integer number (3970050).

Almost surely, 2^51242188 is an apocalyptic number.

51242188 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is an amenable number.

51242188 is a deficient number, since it is larger than the sum of its proper divisors (44039012).

51242188 is a wasteful number, since it uses less digits than its factorization.

51242188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12009 (or 12007 counting only the distinct ones).

The product of its digits is 5120, while the sum is 31.

The square root of 51242188 is about 7158.3648970977. The cubic root of 51242188 is about 371.4290679340.

The spelling of 51242188 in words is "fifty-one million, two hundred forty-two thousand, one hundred eighty-eight".