51106387 has 4 divisors (see below), whose sum is σ = 51258376. Its totient is φ = 50954400.

The previous prime is 51106379. The next prime is 51106411. The reversal of 51106387 is 78360115.

51106387 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78360115 = 5 ⋅15672023.

It is not a de Polignac number, because 51106387 - 2³ = 51106379 is a prime.

It is a super-2 number, since 2×51106387² = 5223725584387538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51106357) 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 3 ways as a sum of consecutive naturals, for example, 75489 + ... + 76162.

It is an arithmetic number, because the mean of its divisors is an integer number (12814594).

Almost surely, 2^51106387 is an apocalyptic number.

51106387 is a deficient number, since it is larger than the sum of its proper divisors (151989).

51106387 is a wasteful number, since it uses less digits than its factorization.

51106387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151988.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 51106387 is about 7148.8731279832. The cubic root of 51106387 is about 371.1006597396.

The spelling of 51106387 in words is "fifty-one million, one hundred six thousand, three hundred eighty-seven".