52506630 has 160 divisors (see below), whose sum is σ = 158070528. Its totient is φ = 12398400.

The previous prime is 52506613. The next prime is 52506647. The reversal of 52506630 is 3660525.

52506630 is a `hidden beast` number, since 5 + 25 + 0 + 6 + 630 = 666.

It is an interprime number because it is at equal distance from previous prime (52506613) and next prime (52506647).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 52506594 and 52506603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 632569 + ... + 632651.

Almost surely, 2^52506630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 52506630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79035264).

52506630 is an abundant number, since it is smaller than the sum of its proper divisors (105563898).

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

52506630 is a wasteful number, since it uses less digits than its factorization.

52506630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184 (or 175 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 52506630 is about 7246.1458721171. The cubic root of 52506630 is about 374.4593809908.

The spelling of 52506630 in words is "fifty-two million, five hundred six thousand, six hundred thirty".