51651313 has 8 divisors (see below), whose sum is σ = 59200128. Its totient is φ = 44145024.

The previous prime is 51651289. The next prime is 51651337. The reversal of 51651313 is 31315615.

It is an interprime number because it is at equal distance from previous prime (51651289) and next prime (51651337).

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

It is a de Polignac number, because none of the positive numbers 2^k-51651313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51651013) 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 7 ways as a sum of consecutive naturals, for example, 7981 + ... + 12922.

It is an arithmetic number, because the mean of its divisors is an integer number (7400016).

Almost surely, 2^51651313 is an apocalyptic number.

It is an amenable number.

51651313 is a deficient number, since it is larger than the sum of its proper divisors (7548815).

51651313 is a wasteful number, since it uses less digits than its factorization.

51651313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21263.

The product of its digits is 1350, while the sum is 25.

The square root of 51651313 is about 7186.8847910621. The cubic root of 51651313 is about 372.4149630970.

Adding to 51651313 its reverse (31315615), we get a palindrome (82966928).

The spelling of 51651313 in words is "fifty-one million, six hundred fifty-one thousand, three hundred thirteen".