22081061 has 4 divisors (see below), whose sum is σ = 22092972. Its totient is φ = 22069152.

The previous prime is 22081057. The next prime is 22081063. The reversal of 22081061 is 16018022.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 16018022 = 2 ⋅8009011.

It can be written as a sum of positive squares in 2 ways, for example, as 18105025 + 3976036 = 4255^2 + 1994^2 .

It is a cyclic number.

It is not a de Polignac number, because 22081061 - 2² = 22081057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22081063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2510 + ... + 7103.

It is an arithmetic number, because the mean of its divisors is an integer number (5523243).

Almost surely, 2^22081061 is an apocalyptic number.

It is an amenable number.

22081061 is a deficient number, since it is larger than the sum of its proper divisors (11911).

22081061 is an equidigital number, since it uses as much as digits as its factorization.

22081061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11910.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 22081061 is about 4699.0489463295. The cubic root of 22081061 is about 280.5476568715.

Adding to 22081061 its reverse (16018022), we get a palindrome (38099083).

The spelling of 22081061 in words is "twenty-two million, eighty-one thousand, sixty-one".