51936138 has 12 divisors (see below), whose sum is σ = 112528338. Its totient is φ = 17312040.

The previous prime is 51936127. The next prime is 51936149. The reversal of 51936138 is 83163915.

It is a happy number.

51936138 is a `hidden beast` number, since 519 + 3 + 6 + 138 = 666.

51936138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51936127) and next prime (51936149).

It can be written as a sum of positive squares in only one way, i.e., 31169889 + 20766249 = 5583^2 + 4557^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1442653 + ... + 1442688.

Almost surely, 2^51936138 is an apocalyptic number.

51936138 is an abundant number, since it is smaller than the sum of its proper divisors (60592200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51936138 is a wasteful number, since it uses less digits than its factorization.

51936138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2885349 (or 2885346 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 51936138 is about 7206.6731575672. The cubic root of 51936138 is about 373.0982546085.

The spelling of 51936138 in words is "fifty-one million, nine hundred thirty-six thousand, one hundred thirty-eight".