51992361 has 10 divisors (see below), whose sum is σ = 77667722. Its totient is φ = 34661520.

The previous prime is 51992359. The next prime is 51992371. The reversal of 51992361 is 16329915.

51992361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 49787136 + 2205225 = 7056^2 + 1485^2 .

It is not a de Polignac number, because 51992361 - 2¹ = 51992359 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51992371) by changing a digit.

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 9 ways as a sum of consecutive naturals, for example, 320860 + ... + 321021.

Almost surely, 2^51992361 is an apocalyptic number.

It is an amenable number.

51992361 is a deficient number, since it is larger than the sum of its proper divisors (25675361).

51992361 is an equidigital number, since it uses as much as digits as its factorization.

51992361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641893 (or 641884 counting only the distinct ones).

The product of its digits is 14580, while the sum is 36.

The square root of 51992361 is about 7210.5728621241. The cubic root of 51992361 is about 373.2328374452.

The spelling of 51992361 in words is "fifty-one million, nine hundred ninety-two thousand, three hundred sixty-one".