51320396 has 12 divisors (see below), whose sum is σ = 89860848. Its totient is φ = 25645872.

The previous prime is 51320393. The next prime is 51320411. The reversal of 51320396 is 69302315.

It is not an unprimeable number, because it can be changed into a prime (51320393) 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, 12425 + ... + 16031.

It is an arithmetic number, because the mean of its divisors is an integer number (7488404).

Almost surely, 2^51320396 is an apocalyptic number.

It is an amenable number.

51320396 is a deficient number, since it is larger than the sum of its proper divisors (38540452).

51320396 is a wasteful number, since it uses less digits than its factorization.

51320396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7168 (or 7166 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 29.

The square root of 51320396 is about 7163.8255143464. The cubic root of 51320396 is about 371.6179354780.

The spelling of 51320396 in words is "fifty-one million, three hundred twenty thousand, three hundred ninety-six".