111655540 has 12 divisors (see below), whose sum is σ = 234476676. Its totient is φ = 44662208.

The previous prime is 111655513. The next prime is 111655613. The reversal of 111655540 is 45556111.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 82192356 + 29463184 = 9066^2 + 5428^2 .

It is a super-2 number, since 2×111655540² = 24933919225383200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111655499 and 111655508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2791369 + ... + 2791408.

It is an arithmetic number, because the mean of its divisors is an integer number (19539723).

Almost surely, 2^111655540 is an apocalyptic number.

111655540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111655540 is an abundant number, since it is smaller than the sum of its proper divisors (122821136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111655540 is a wasteful number, since it uses less digits than its factorization.

111655540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5582786 (or 5582784 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 28.

The square root of 111655540 is about 10566.7185067077. The cubic root of 111655540 is about 481.5337801194.

The spelling of 111655540 in words is "one hundred eleven million, six hundred fifty-five thousand, five hundred forty".