51163320 has 64 divisors (see below), whose sum is σ = 165301920. Its totient is φ = 12593664.

The previous prime is 51163309. The next prime is 51163327. The reversal of 51163320 is 2336115.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51163327) 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 15 ways as a sum of consecutive naturals, for example, 14839 + ... + 17958.

Almost surely, 2^51163320 is an apocalyptic number.

It is an amenable number.

51163320 is an abundant number, since it is smaller than the sum of its proper divisors (114138600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51163320 is a wasteful number, since it uses less digits than its factorization.

51163320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32824 (or 32820 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 51163320 is about 7152.8539758617. The cubic root of 51163320 is about 371.2384118185.

Adding to 51163320 its reverse (2336115), we get a palindrome (53499435).

The spelling of 51163320 in words is "fifty-one million, one hundred sixty-three thousand, three hundred twenty".