51163530 has 64 divisors (see below), whose sum is σ = 134742528. Its totient is φ = 12330560.

The previous prime is 51163517. The next prime is 51163549. The reversal of 51163530 is 3536115.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51163530.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 74569 + ... + 75251.

It is an arithmetic number, because the mean of its divisors is an integer number (2105352).

Almost surely, 2^51163530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51163530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67371264).

51163530 is an abundant number, since it is smaller than the sum of its proper divisors (83578998).

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

51163530 is a wasteful number, since it uses less digits than its factorization.

51163530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931.

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

The square root of 51163530 is about 7152.8686553019. The cubic root of 51163530 is about 371.2389197341.

Adding to 51163530 its reverse (3536115), we get a palindrome (54699645).

It can be divided in two parts, 5116 and 3530, that added together give a triangular number (8646 = T₁₃₁).

The spelling of 51163530 in words is "fifty-one million, one hundred sixty-three thousand, five hundred thirty".