252522018 has 48 divisors (see below), whose sum is σ = 631515456. Its totient is φ = 71431200.

The previous prime is 252522007. The next prime is 252522031. The reversal of 252522018 is 810225252.

It is a junction number, because it is equal to n+sod(n) for n = 252521982 and 252522000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2805 + ... + 22647.

It is an arithmetic number, because the mean of its divisors is an integer number (13156572).

Almost surely, 2^252522018 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 252522018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (315757728).

252522018 is an abundant number, since it is smaller than the sum of its proper divisors (378993438).

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

252522018 is a wasteful number, since it uses less digits than its factorization.

252522018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19959 (or 19956 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 252522018 is about 15890.9413818062. The cubic root of 252522018 is about 632.0718035841.

The spelling of 252522018 in words is "two hundred fifty-two million, five hundred twenty-two thousand, eighteen".