51421996 has 12 divisors (see below), whose sum is σ = 90132952. Its totient is φ = 25669728.

The previous prime is 51421973. The next prime is 51422011. The reversal of 51421996 is 69912415.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7425 + ... + 12568.

Almost surely, 2^51421996 is an apocalyptic number.

It is an amenable number.

51421996 is a deficient number, since it is larger than the sum of its proper divisors (38710956).

51421996 is a wasteful number, since it uses less digits than its factorization.

51421996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20640 (or 20638 counting only the distinct ones).

The product of its digits is 19440, while the sum is 37.

The square root of 51421996 is about 7170.9131914980. The cubic root of 51421996 is about 371.8630069432.

The spelling of 51421996 in words is "fifty-one million, four hundred twenty-one thousand, nine hundred ninety-six".