51427998 has 24 divisors (see below), whose sum is σ = 112999536. Its totient is φ = 16900800.

The previous prime is 51427997. The next prime is 51428017. The reversal of 51427998 is 89972415.

51427998 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 (51427997) 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 11 ways as a sum of consecutive naturals, for example, 18843 + ... + 21398.

It is an arithmetic number, because the mean of its divisors is an integer number (4708314).

Almost surely, 2^51427998 is an apocalyptic number.

51427998 is an abundant number, since it is smaller than the sum of its proper divisors (61571538).

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

51427998 is a wasteful number, since it uses less digits than its factorization.

51427998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40320 (or 40317 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 51427998 is about 7171.3316754979. The cubic root of 51427998 is about 371.8774743898.

It can be divided in two parts, 51427 and 998, that added together give a palindrome (52425).

The spelling of 51427998 in words is "fifty-one million, four hundred twenty-seven thousand, nine hundred ninety-eight".