111222552 has 128 divisors (see below), whose sum is σ = 331200000. Its totient is φ = 31102848.

The previous prime is 111222533. The next prime is 111222571. The reversal of 111222552 is 255222111.

It is an interprime number because it is at equal distance from previous prime (111222533) and next prime (111222571).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 485574 + ... + 485802.

It is an arithmetic number, because the mean of its divisors is an integer number (2587500).

Almost surely, 2^111222552 is an apocalyptic number.

111222552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111222552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165600000).

111222552 is an abundant number, since it is smaller than the sum of its proper divisors (219977448).

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

111222552 is a wasteful number, since it uses less digits than its factorization.

111222552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318 (or 300 counting only the distinct ones).

The product of its digits is 400, while the sum is 21.

The square root of 111222552 is about 10546.2103146106. The cubic root of 111222552 is about 480.9105286390.

Adding to 111222552 its reverse (255222111), we get a palindrome (366444663).

The spelling of 111222552 in words is "one hundred eleven million, two hundred twenty-two thousand, five hundred fifty-two".