51359938 has 12 divisors (see below), whose sum is σ = 89618022. Its totient is φ = 22011360.

The previous prime is 51359923. The next prime is 51359939. The reversal of 51359938 is 83995315.

It can be written as a sum of positive squares in only one way, i.e., 50879689 + 480249 = 7133^2 + 693^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51359894 and 51359903.

It is not an unprimeable number, because it can be changed into a prime (51359939) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 261943 + ... + 262138.

Almost surely, 2^51359938 is an apocalyptic number.

51359938 is a deficient number, since it is larger than the sum of its proper divisors (38258084).

51359938 is a wasteful number, since it uses less digits than its factorization.

51359938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524097 (or 524090 counting only the distinct ones).

The product of its digits is 145800, while the sum is 43.

The square root of 51359938 is about 7166.5848212381. The cubic root of 51359938 is about 371.7133539676.

The spelling of 51359938 in words is "fifty-one million, three hundred fifty-nine thousand, nine hundred thirty-eight".