51422506 has 4 divisors (see below), whose sum is σ = 77133762. Its totient is φ = 25711252.

The previous prime is 51422491. The next prime is 51422533. The reversal of 51422506 is 60522415.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60522415 = 5 ⋅12104483.

It can be written as a sum of positive squares in only one way, i.e., 28526281 + 22896225 = 5341^2 + 4785^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12855625 + ... + 12855628.

Almost surely, 2^51422506 is an apocalyptic number.

51422506 is a deficient number, since it is larger than the sum of its proper divisors (25711256).

51422506 is a wasteful number, since it uses less digits than its factorization.

51422506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25711255.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 51422506 is about 7170.9487517343. The cubic root of 51422506 is about 371.8642363102.

Subtracting 51422506 from its reverse (60522415), we obtain a palindrome (9099909).

The spelling of 51422506 in words is "fifty-one million, four hundred twenty-two thousand, five hundred six".