221233116 has 24 divisors (see below), whose sum is σ = 555919504. Its totient is φ = 68071680.

The previous prime is 221233109. The next prime is 221233139. The reversal of 221233116 is 611332122.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 221233092 and 221233101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 708925 + ... + 709236.

Almost surely, 2^221233116 is an apocalyptic number.

221233116 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

221233116 is an abundant number, since it is smaller than the sum of its proper divisors (334686388).

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

221233116 is a wasteful number, since it uses less digits than its factorization.

221233116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1418181 (or 1418179 counting only the distinct ones).

The product of its digits is 432, while the sum is 21.

The square root of 221233116 is about 14873.9072203641. The cubic root of 221233116 is about 604.8068650189.

Adding to 221233116 its reverse (611332122), we get a palindrome (832565238).

The spelling of 221233116 in words is "two hundred twenty-one million, two hundred thirty-three thousand, one hundred sixteen".