51516330 has 32 divisors (see below), whose sum is σ = 125670528. Its totient is φ = 13512000.

The previous prime is 51516317. The next prime is 51516331. The reversal of 51516330 is 3361515.

It is a self number, because there is not a number n which added to its sum of digits gives 51516330.

It is not an unprimeable number, because it can be changed into a prime (51516331) 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, 12246 + ... + 15905.

It is an arithmetic number, because the mean of its divisors is an integer number (3927204).

Almost surely, 2^51516330 is an apocalyptic number.

51516330 is an abundant number, since it is smaller than the sum of its proper divisors (74154198).

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

51516330 is a wasteful number, since it uses less digits than its factorization.

51516330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28222.

The product of its (nonzero) digits is 1350, while the sum is 24.

The square root of 51516330 is about 7177.4877220376. The cubic root of 51516330 is about 372.0902631006.

Adding to 51516330 its reverse (3361515), we get a palindrome (54877845).

The spelling of 51516330 in words is "fifty-one million, five hundred sixteen thousand, three hundred thirty".