221144031 has 6 divisors (see below), whose sum is σ = 319430280. Its totient is φ = 147429348.

The previous prime is 221144023. The next prime is 221144047. The reversal of 221144031 is 130441122.

221144031 is a `hidden beast` number, since 221 + 1 + 440 + 3 + 1 = 666.

It is not a de Polignac number, because 221144031 - 2³ = 221144023 is a prime.

It is a super-2 number, since 2×221144031² = 97809364893857922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221143995 and 221144013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221143031) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12285771 + ... + 12285788.

It is an arithmetic number, because the mean of its divisors is an integer number (53238380).

Almost surely, 2^221144031 is an apocalyptic number.

221144031 is a deficient number, since it is larger than the sum of its proper divisors (98286249).

221144031 is a wasteful number, since it uses less digits than its factorization.

221144031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24571565 (or 24571562 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 221144031 is about 14870.9122450507. The cubic root of 221144031 is about 604.7256739596.

Adding to 221144031 its reverse (130441122), we get a palindrome (351585153).

The spelling of 221144031 in words is "two hundred twenty-one million, one hundred forty-four thousand, thirty-one".