51687119 has 8 divisors (see below), whose sum is σ = 56484480. Its totient is φ = 46906200.

The previous prime is 51687109. The next prime is 51687121. The reversal of 51687119 is 91178615.

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

It is not a de Polignac number, because 51687119 - 2⁸ = 51686863 is a prime.

It is a super-2 number, since 2×51687119² = 5343116541040322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51687109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3014 + ... + 10604.

It is an arithmetic number, because the mean of its divisors is an integer number (7060560).

Almost surely, 2^51687119 is an apocalyptic number.

51687119 is a deficient number, since it is larger than the sum of its proper divisors (4797361).

51687119 is a wasteful number, since it uses less digits than its factorization.

51687119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8221.

The product of its digits is 15120, while the sum is 38.

The square root of 51687119 is about 7189.3754248891. The cubic root of 51687119 is about 372.5009990514.

The spelling of 51687119 in words is "fifty-one million, six hundred eighty-seven thousand, one hundred nineteen".