22061520 has 120 divisors (see below), whose sum is σ = 79823016. Its totient is φ = 5428224.

The previous prime is 22061513. The next prime is 22061569. The reversal of 22061520 is 2516022.

It can be written as a sum of positive squares in 4 ways, for example, as 46656 + 22014864 = 216^2 + 4692^2 .

It is a tau number, because it is divible by the number of its divisors (120).

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 = 22061493 and 22061502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8182 + ... + 10538.

Almost surely, 2^22061520 is an apocalyptic number.

22061520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22061520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39911508).

22061520 is an abundant number, since it is smaller than the sum of its proper divisors (57761496).

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

22061520 is a wasteful number, since it uses less digits than its factorization.

22061520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2389 (or 2380 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 22061520 is about 4696.9692355816. The cubic root of 22061520 is about 280.4648740176.

Adding to 22061520 its reverse (2516022), we get a palindrome (24577542).

The spelling of 22061520 in words is "twenty-two million, sixty-one thousand, five hundred twenty".