111406553 has 4 divisors (see below), whose sum is σ = 114123828. Its totient is φ = 108689280.

The previous prime is 111406543. The next prime is 111406571. The reversal of 111406553 is 355604111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 355604111 = 41 ⋅8673271.

It can be written as a sum of positive squares in 2 ways, for example, as 63409369 + 47997184 = 7963^2 + 6928^2 .

It is a cyclic number.

It is not a de Polignac number, because 111406553 - 2²² = 107212249 is a prime.

It is a super-2 number, since 2×111406553² = 24822840102683618, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (111406513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1358576 + ... + 1358657.

It is an arithmetic number, because the mean of its divisors is an integer number (28530957).

Almost surely, 2^111406553 is an apocalyptic number.

It is an amenable number.

111406553 is a deficient number, since it is larger than the sum of its proper divisors (2717275).

111406553 is an equidigital number, since it uses as much as digits as its factorization.

111406553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2717274.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 111406553 is about 10554.9302697839. The cubic root of 111406553 is about 481.1755805991.

The spelling of 111406553 in words is "one hundred eleven million, four hundred six thousand, five hundred fifty-three".