21522102 has 64 divisors (see below), whose sum is σ = 53374464. Its totient is φ = 5644800.

The previous prime is 21522101. The next prime is 21522103. The reversal of 21522102 is 20122512.

It is an interprime number because it is at equal distance from previous prime (21522101) and next prime (21522103).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21522101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30352 + ... + 31052.

It is an arithmetic number, because the mean of its divisors is an integer number (833976).

Almost surely, 2^21522102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21522102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26687232).

21522102 is an abundant number, since it is smaller than the sum of its proper divisors (31852362).

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

21522102 is a wasteful number, since it uses less digits than its factorization.

21522102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 21522102 is about 4639.1919555026. The cubic root of 21522102 is about 278.1601392626.

Adding to 21522102 its reverse (20122512), we get a palindrome (41644614).

The spelling of 21522102 in words is "twenty-one million, five hundred twenty-two thousand, one hundred two".