51930538 has 12 divisors (see below), whose sum is σ = 85621410. Its totient is φ = 23604680.

The previous prime is 51930533. The next prime is 51930547. The reversal of 51930538 is 83503915.

It can be written as a sum of positive squares in only one way, i.e., 49098049 + 2832489 = 7007^2 + 1683^2 .

It is not an unprimeable number, because it can be changed into a prime (51930533) 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, 107053 + ... + 107536.

Almost surely, 2^51930538 is an apocalyptic number.

51930538 is a deficient number, since it is larger than the sum of its proper divisors (33690872).

51930538 is a wasteful number, since it uses less digits than its factorization.

51930538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214613 (or 214602 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 51930538 is about 7206.2846183037. The cubic root of 51930538 is about 373.0848443871.

The spelling of 51930538 in words is "fifty-one million, nine hundred thirty thousand, five hundred thirty-eight".