21202522 has 8 divisors (see below), whose sum is σ = 34695072. Its totient is φ = 9637500.

The previous prime is 21202513. The next prime is 21202541. The reversal of 21202522 is 22520212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21202496 and 21202505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 481854 + ... + 481897.

It is an arithmetic number, because the mean of its divisors is an integer number (4336884).

Almost surely, 2^21202522 is an apocalyptic number.

21202522 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21202522 is a deficient number, since it is larger than the sum of its proper divisors (13492550).

21202522 is a wasteful number, since it uses less digits than its factorization.

21202522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 963764.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 21202522 is about 4604.6196368430. The cubic root of 21202522 is about 276.7764751773.

Adding to 21202522 its reverse (22520212), we get a palindrome (43722734).

The spelling of 21202522 in words is "twenty-one million, two hundred two thousand, five hundred twenty-two".