51932138 has 4 divisors (see below), whose sum is σ = 77898210. Its totient is φ = 25966068.

The previous prime is 51932131. The next prime is 51932141. The reversal of 51932138 is 83123915.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 31888609 + 20043529 = 5647^2 + 4477^2 .

It is not an unprimeable number, because it can be changed into a prime (51932131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12983033 + ... + 12983036.

Almost surely, 2^51932138 is an apocalyptic number.

51932138 is a deficient number, since it is larger than the sum of its proper divisors (25966072).

51932138 is a wasteful number, since it uses less digits than its factorization.

51932138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25966071.

The product of its digits is 6480, while the sum is 32.

The square root of 51932138 is about 7206.3956316594. The cubic root of 51932138 is about 373.0886759773.

The spelling of 51932138 in words is "fifty-one million, nine hundred thirty-two thousand, one hundred thirty-eight".