21114522 has 72 divisors (see below), whose sum is σ = 54127008. Its totient is φ = 5896800.

The previous prime is 21114521. The next prime is 21114547. The reversal of 21114522 is 22541112.

21114522 is a `hidden beast` number, since 211 + 1 + 452 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21114495 and 21114504.

It is not an unprimeable number, because it can be changed into a prime (21114521) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 33147 + ... + 33777.

It is an arithmetic number, because the mean of its divisors is an integer number (751764).

Almost surely, 2^21114522 is an apocalyptic number.

21114522 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 21114522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27063504).

21114522 is an abundant number, since it is smaller than the sum of its proper divisors (33012486).

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

21114522 is a wasteful number, since it uses less digits than its factorization.

21114522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676 (or 660 counting only the distinct ones).

The product of its digits is 160, while the sum is 18.

The square root of 21114522 is about 4595.0540802041. The cubic root of 21114522 is about 276.3930285869.

Adding to 21114522 its reverse (22541112), we get a palindrome (43655634).

The spelling of 21114522 in words is "twenty-one million, one hundred fourteen thousand, five hundred twenty-two".