51291422 has 32 divisors (see below), whose sum is σ = 97757184. Its totient is φ = 19634400.

The previous prime is 51291419. The next prime is 51291433. The reversal of 51291422 is 22419215.

51291422 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 51291391 and 51291400.

It is a congruent number.

It is an unprimeable number.

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, 1097 + ... + 10187.

It is an arithmetic number, because the mean of its divisors is an integer number (3054912).

Almost surely, 2^51291422 is an apocalyptic number.

51291422 is a deficient number, since it is larger than the sum of its proper divisors (46465762).

51291422 is a wasteful number, since it uses less digits than its factorization.

51291422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9144.

The product of its digits is 1440, while the sum is 26.

The square root of 51291422 is about 7161.8029852824. The cubic root of 51291422 is about 371.5479874273.

The spelling of 51291422 in words is "fifty-one million, two hundred ninety-one thousand, four hundred twenty-two".