22061601 has 6 divisors (see below), whose sum is σ = 31866770. Its totient is φ = 14707728.

The previous prime is 22061573. The next prime is 22061609. The reversal of 22061601 is 10616022.

It is a happy number.

22061601 is a `hidden beast` number, since 2 + 2 + 0 + 61 + 601 = 666.

It can be written as a sum of positive squares in only one way, i.e., 21902400 + 159201 = 4680^2 + 399^2 .

It is not a de Polignac number, because 22061601 - 2⁵ = 22061569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22061609) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1225636 + ... + 1225653.

Almost surely, 2^22061601 is an apocalyptic number.

It is an amenable number.

22061601 is a deficient number, since it is larger than the sum of its proper divisors (9805169).

22061601 is a wasteful number, since it uses less digits than its factorization.

22061601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2451295 (or 2451292 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 22061601 is about 4696.9778581552. The cubic root of 22061601 is about 280.4652172642.

Adding to 22061601 its reverse (10616022), we get a palindrome (32677623).

The spelling of 22061601 in words is "twenty-two million, sixty-one thousand, six hundred one".