51425422 has 4 divisors (see below), whose sum is σ = 77138136. Its totient is φ = 25712710.

The previous prime is 51425417. The next prime is 51425431. The reversal of 51425422 is 22452415.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12856354 + ... + 12856357.

It is an arithmetic number, because the mean of its divisors is an integer number (19284534).

Almost surely, 2^51425422 is an apocalyptic number.

51425422 is a deficient number, since it is larger than the sum of its proper divisors (25712714).

51425422 is a wasteful number, since it uses less digits than its factorization.

51425422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25712713.

The product of its digits is 3200, while the sum is 25.

The square root of 51425422 is about 7171.1520692285. The cubic root of 51425422 is about 371.8712652404.

Adding to 51425422 its reverse (22452415), we get a palindrome (73877837).

The spelling of 51425422 in words is "fifty-one million, four hundred twenty-five thousand, four hundred twenty-two".