51630696 has 128 divisors (see below), whose sum is σ = 157046400. Its totient is φ = 15816384.

The previous prime is 51630679. The next prime is 51630697. The reversal of 51630696 is 69603615.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 51630696.

It is not an unprimeable number, because it can be changed into a prime (51630697) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 227335 + ... + 227561.

It is an arithmetic number, because the mean of its divisors is an integer number (1226925).

Almost surely, 2^51630696 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51630696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78523200).

51630696 is an abundant number, since it is smaller than the sum of its proper divisors (105415704).

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

51630696 is a wasteful number, since it uses less digits than its factorization.

51630696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267 (or 245 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 51630696 is about 7185.4502990418. The cubic root of 51630696 is about 372.3654057823.

It can be divided in two parts, 51630 and 696, that added together give a triangular number (52326 = T₃₂₃).

The spelling of 51630696 in words is "fifty-one million, six hundred thirty thousand, six hundred ninety-six".