51651115 has 8 divisors (see below), whose sum is σ = 63980928. Its totient is φ = 39987840.

The previous prime is 51651113. The next prime is 51651121. The reversal of 51651115 is 51115615.

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

It is not a de Polignac number, because 51651115 - 2¹ = 51651113 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51651115.

It is not an unprimeable number, because it can be changed into a prime (51651113) 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, 166462 + ... + 166771.

It is an arithmetic number, because the mean of its divisors is an integer number (7997616).

Almost surely, 2^51651115 is an apocalyptic number.

51651115 is a deficient number, since it is larger than the sum of its proper divisors (12329813).

51651115 is a wasteful number, since it uses less digits than its factorization.

51651115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333269.

The product of its digits is 750, while the sum is 25.

The square root of 51651115 is about 7186.8710159568. The cubic root of 51651115 is about 372.4144872249.

The spelling of 51651115 in words is "fifty-one million, six hundred fifty-one thousand, one hundred fifteen".