Base | Representation |
---|---|
bin | 101010111101… |
… | …0010011010000 |
3 | 1120101012001121 |
4 | 1111322103100 |
5 | 21231133130 |
6 | 2122412024 |
7 | 362266003 |
oct | 125722320 |
9 | 46335047 |
10 | 22521040 |
11 | 11792433 |
12 | 7661014 |
13 | 4886a79 |
14 | 2dc353a |
15 | 1e9cd7a |
hex | 157a4d0 |
22521040 has 40 divisors (see below), whose sum is σ = 52664040. Its totient is φ = 8956416.
The previous prime is 22520999. The next prime is 22521041. The reversal of 22521040 is 4012522.
It can be written as a sum of positive squares in 4 ways, for example, as 3125824 + 19395216 = 1768^2 + 4404^2 .
It is a tau number, because it is divible by the number of its divisors (40).
It is a Harshad number since it is a multiple of its sum of digits (16).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (22521041) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15046 + ... + 16474.
It is an arithmetic number, because the mean of its divisors is an integer number (1316601).
Almost surely, 222521040 is an apocalyptic number.
22521040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.
It is an amenable number.
22521040 is an abundant number, since it is smaller than the sum of its proper divisors (30143000).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
22521040 is a wasteful number, since it uses less digits than its factorization.
22521040 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1639 (or 1633 counting only the distinct ones).
The product of its (nonzero) digits is 160, while the sum is 16.
The square root of 22521040 is about 4745.6337827523. The cubic root of 22521040 is about 282.3987785741.
Adding to 22521040 its reverse (4012522), we get a palindrome (26533562).
The spelling of 22521040 in words is "twenty-two million, five hundred twenty-one thousand, forty".
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