22061557 has 8 divisors (see below), whose sum is σ = 25255232. Its totient is φ = 18878400.

The previous prime is 22061513. The next prime is 22061569. The reversal of 22061557 is 75516022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22061557 - 2¹¹ = 22059509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22061857) 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, 2557 + ... + 7117.

It is an arithmetic number, because the mean of its divisors is an integer number (3156904).

Almost surely, 2^22061557 is an apocalyptic number.

It is an amenable number.

22061557 is a deficient number, since it is larger than the sum of its proper divisors (3193675).

22061557 is an equidigital number, since it uses as much as digits as its factorization.

22061557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5259.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 22061557 is about 4696.9731742900. The cubic root of 22061557 is about 280.4650308094.

Adding to 22061557 its reverse (75516022), we get a palindrome (97577579).

The spelling of 22061557 in words is "twenty-two million, sixty-one thousand, five hundred fifty-seven".