51163331 has 4 divisors (see below), whose sum is σ = 51214464. Its totient is φ = 51112200.

The previous prime is 51163327. The next prime is 51163351. The reversal of 51163331 is 13336115.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51163331 - 2² = 51163327 is a prime.

It is a super-2 number, since 2×51163331² = 5235372878031122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51163297 and 51163306.

It is not an unprimeable number, because it can be changed into a prime (51163351) 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 3 ways as a sum of consecutive naturals, for example, 24035 + ... + 26076.

It is an arithmetic number, because the mean of its divisors is an integer number (12803616).

Almost surely, 2^51163331 is an apocalyptic number.

51163331 is a deficient number, since it is larger than the sum of its proper divisors (51133).

51163331 is a wasteful number, since it uses less digits than its factorization.

51163331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51132.

The product of its digits is 810, while the sum is 23.

The square root of 51163331 is about 7152.8547447855. The cubic root of 51163331 is about 371.2384384236.

Adding to 51163331 its reverse (13336115), we get a palindrome (64499446).

The spelling of 51163331 in words is "fifty-one million, one hundred sixty-three thousand, three hundred thirty-one".