111145558225 has 81 divisors (see below), whose sum is σ = 156711003057. Its totient is φ = 78156112320.

The previous prime is 111145558211. The next prime is 111145558273. The reversal of 111145558225 is 522855541111.

It is a happy number.

The square root of 111145558225 is 333385.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 28647932049 + 82497626176 = 169257^2 + 287224^2 .

It is not a de Polignac number, because 111145558225 - 2¹⁵ = 111145525457 is a prime.

It is a super-2 number, since 2×111145558225² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 498410464 + ... + 498410686.

Almost surely, 2^111145558225 is an apocalyptic number.

111145558225 is the 333385-th square number.

111145558225 is the 166693-rd centered octagonal number.

It is an amenable number.

111145558225 is a deficient number, since it is larger than the sum of its proper divisors (45565444832).

111145558225 is an equidigital number, since it uses as much as digits as its factorization.

111145558225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528 (or 264 counting only the distinct ones).

The product of its digits is 80000, while the sum is 40.

The spelling of 111145558225 in words is "one hundred eleven billion, one hundred forty-five million, five hundred fifty-eight thousand, two hundred twenty-five".