52551630 has 48 divisors (see below), whose sum is σ = 137985120. Its totient is φ = 13875264.

The previous prime is 52551623. The next prime is 52551637. The reversal of 52551630 is 3615525.

52551630 is a `hidden beast` number, since 5 + 25 + 5 + 1 + 630 = 666.

It is an interprime number because it is at equal distance from previous prime (52551623) and next prime (52551637).

It is a junction number, because it is equal to n+sod(n) for n = 52551594 and 52551603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52551637) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6436 + ... + 12104.

It is an arithmetic number, because the mean of its divisors is an integer number (2874690).

Almost surely, 2^52551630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 52551630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68992560).

52551630 is an abundant number, since it is smaller than the sum of its proper divisors (85433490).

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

52551630 is a wasteful number, since it uses less digits than its factorization.

52551630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5785 (or 5782 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 52551630 is about 7249.2503060661. The cubic root of 52551630 is about 374.5663253301.

The spelling of 52551630 in words is "fifty-two million, five hundred fifty-one thousand, six hundred thirty".