111220553 has 8 divisors (see below), whose sum is σ = 113504328. Its totient is φ = 108943744.

The previous prime is 111220531. The next prime is 111220559. The reversal of 111220553 is 355022111.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10679824 + 100540729 = 3268^2 + 10027^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111220553 is a prime.

It is a super-2 number, since 2×111220553² = 24740022819251618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111220559) 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, 40925 + ... + 43557.

It is an arithmetic number, because the mean of its divisors is an integer number (14188041).

Almost surely, 2^111220553 is an apocalyptic number.

It is an amenable number.

111220553 is a deficient number, since it is larger than the sum of its proper divisors (2283775).

111220553 is an equidigital number, since it uses as much as digits as its factorization.

111220553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3483.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 111220553 is about 10546.1155408046. The cubic root of 111220553 is about 480.9076474909.

Adding to 111220553 its reverse (355022111), we get a palindrome (466242664).

The spelling of 111220553 in words is "one hundred eleven million, two hundred twenty thousand, five hundred fifty-three".