51486937 has 4 divisors (see below), whose sum is σ = 51534720. Its totient is φ = 51439156.

The previous prime is 51486917. The next prime is 51486947. The reversal of 51486937 is 73968415.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51486937 - 2²³ = 43098329 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51486893 and 51486902.

It is not an unprimeable number, because it can be changed into a prime (51486917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22237 + ... + 24442.

It is an arithmetic number, because the mean of its divisors is an integer number (12883680).

Almost surely, 2^51486937 is an apocalyptic number.

It is an amenable number.

51486937 is a deficient number, since it is larger than the sum of its proper divisors (47783).

51486937 is a wasteful number, since it uses less digits than its factorization.

51486937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47782.

The product of its digits is 181440, while the sum is 43.

The square root of 51486937 is about 7175.4398471453. The cubic root of 51486937 is about 372.0194834093.

The spelling of 51486937 in words is "fifty-one million, four hundred eighty-six thousand, nine hundred thirty-seven".