252521522 has 16 divisors (see below), whose sum is σ = 424386432. Its totient is φ = 111679920.

The previous prime is 252521491. The next prime is 252521539. The reversal of 252521522 is 225125252.

It is a junction number, because it is equal to n+sod(n) for n = 252521491 and 252521500.

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 7 ways as a sum of consecutive naturals, for example, 154298 + ... + 155925.

It is an arithmetic number, because the mean of its divisors is an integer number (26524152).

Almost surely, 2^252521522 is an apocalyptic number.

252521522 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

252521522 is a deficient number, since it is larger than the sum of its proper divisors (171864910).

252521522 is a wasteful number, since it uses less digits than its factorization.

252521522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310273.

The product of its digits is 4000, while the sum is 26.

The square root of 252521522 is about 15890.9257754229. The cubic root of 252521522 is about 632.0713897485.

Adding to 252521522 its reverse (225125252), we get a palindrome (477646774).

The spelling of 252521522 in words is "two hundred fifty-two million, five hundred twenty-one thousand, five hundred twenty-two".