51990927 has 8 divisors (see below), whose sum is σ = 70199040. Its totient is φ = 34221720.

The previous prime is 51990893. The next prime is 51990931. The reversal of 51990927 is 72909915.

51990927 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51990927 - 2⁸ = 51990671 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51990227) 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 7 ways as a sum of consecutive naturals, for example, 109449 + ... + 109922.

It is an arithmetic number, because the mean of its divisors is an integer number (8774880).

Almost surely, 2^51990927 is an apocalyptic number.

51990927 is a deficient number, since it is larger than the sum of its proper divisors (18208113).

51990927 is a wasteful number, since it uses less digits than its factorization.

51990927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219453.

The product of its (nonzero) digits is 51030, while the sum is 42.

The square root of 51990927 is about 7210.4734241241. The cubic root of 51990927 is about 373.2294060384.

The spelling of 51990927 in words is "fifty-one million, nine hundred ninety thousand, nine hundred twenty-seven".