51422239 has 8 divisors (see below), whose sum is σ = 56351232. Its totient is φ = 46535640.

The previous prime is 51422233. The next prime is 51422251. The reversal of 51422239 is 93222415.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51422239 - 2²⁵ = 17867807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51422233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8029 + ... + 12934.

It is an arithmetic number, because the mean of its divisors is an integer number (7043904).

Almost surely, 2^51422239 is an apocalyptic number.

51422239 is a deficient number, since it is larger than the sum of its proper divisors (4928993).

51422239 is a wasteful number, since it uses less digits than its factorization.

51422239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21197.

The product of its digits is 4320, while the sum is 28.

The square root of 51422239 is about 7170.9301349267. The cubic root of 51422239 is about 371.8635927014.

It can be divided in two parts, 5142 and 2239, that added together give a triangular number (7381 = T₁₂₁).

The spelling of 51422239 in words is "fifty-one million, four hundred twenty-two thousand, two hundred thirty-nine".