51731486 has 8 divisors (see below), whose sum is σ = 77768400. Its totient is φ = 25808688.

The previous prime is 51731411. The next prime is 51731497. The reversal of 51731486 is 68413715.

51731486 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 a super-2 number, since 2×51731486² = 5352293287536392, which contains 22 as substring.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 27386 + ... + 29213.

It is an arithmetic number, because the mean of its divisors is an integer number (9721050).

Almost surely, 2^51731486 is an apocalyptic number.

51731486 is a deficient number, since it is larger than the sum of its proper divisors (26036914).

51731486 is a wasteful number, since it uses less digits than its factorization.

51731486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57058.

The product of its digits is 20160, while the sum is 35.

The square root of 51731486 is about 7192.4603579026. The cubic root of 51731486 is about 372.6075505848.

The spelling of 51731486 in words is "fifty-one million, seven hundred thirty-one thousand, four hundred eighty-six".