22220557 has 8 divisors (see below), whose sum is σ = 23496800. Its totient is φ = 20955024.

The previous prime is 22220537. The next prime is 22220603. The reversal of 22220557 is 75502222.

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

It is not a de Polignac number, because 22220557 - 2¹¹ = 22218509 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 (22220537) 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, 1798 + ... + 6904.

It is an arithmetic number, because the mean of its divisors is an integer number (2937100).

Almost surely, 2^22220557 is an apocalyptic number.

It is an amenable number.

22220557 is a deficient number, since it is larger than the sum of its proper divisors (1276243).

22220557 is a wasteful number, since it uses less digits than its factorization.

22220557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5355.

The product of its (nonzero) digits is 2800, while the sum is 25.

The square root of 22220557 is about 4713.8685811125. The cubic root of 22220557 is about 281.1371990777.

Adding to 22220557 its reverse (75502222), we get a palindrome (97722779).

It can be divided in two parts, 222 and 20557, that multiplied together give a palindrome (4563654).

The spelling of 22220557 in words is "twenty-two million, two hundred twenty thousand, five hundred fifty-seven".