51191422 has 8 divisors (see below), whose sum is σ = 80125776. Its totient is φ = 24482832.

The previous prime is 51191419. The next prime is 51191429. The reversal of 51191422 is 22419115.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51191429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 556383 + ... + 556474.

It is an arithmetic number, because the mean of its divisors is an integer number (10015722).

Almost surely, 2^51191422 is an apocalyptic number.

51191422 is a deficient number, since it is larger than the sum of its proper divisors (28934354).

51191422 is a wasteful number, since it uses less digits than its factorization.

51191422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1112882.

The product of its digits is 720, while the sum is 25.

The square root of 51191422 is about 7154.8180969190. The cubic root of 51191422 is about 371.3063682657.

The spelling of 51191422 in words is "fifty-one million, one hundred ninety-one thousand, four hundred twenty-two".