51688113 has 8 divisors (see below), whose sum is σ = 72544800. Its totient is φ = 32645088.

The previous prime is 51688103. The next prime is 51688139. The reversal of 51688113 is 31188615.

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

It is not a de Polignac number, because 51688113 - 2¹³ = 51679921 is a prime.

It is a super-2 number, since 2×51688113² = 5343322051001538, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51688103) 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, 453348 + ... + 453461.

It is an arithmetic number, because the mean of its divisors is an integer number (9068100).

Almost surely, 2^51688113 is an apocalyptic number.

It is an amenable number.

51688113 is a deficient number, since it is larger than the sum of its proper divisors (20856687).

51688113 is a wasteful number, since it uses less digits than its factorization.

51688113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906831.

The product of its digits is 5760, while the sum is 33.

The square root of 51688113 is about 7189.4445543449. Note that the first 3 decimals coincide. The cubic root of 51688113 is about 372.5033869037.

The spelling of 51688113 in words is "fifty-one million, six hundred eighty-eight thousand, one hundred thirteen".