221231383 has 8 divisors (see below), whose sum is σ = 233014320. Its totient is φ = 209462400.

The previous prime is 221231377. The next prime is 221231389. The reversal of 221231383 is 383132122.

It is an interprime number because it is at equal distance from previous prime (221231377) and next prime (221231389).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221231383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221231389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51141 + ... + 55297.

It is an arithmetic number, because the mean of its divisors is an integer number (29126790).

Almost surely, 2^221231383 is an apocalyptic number.

221231383 is a deficient number, since it is larger than the sum of its proper divisors (11782937).

221231383 is a wasteful number, since it uses less digits than its factorization.

221231383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6977.

The product of its digits is 1728, while the sum is 25.

The square root of 221231383 is about 14873.8489638694. The cubic root of 221231383 is about 604.8052857903.

The spelling of 221231383 in words is "two hundred twenty-one million, two hundred thirty-one thousand, three hundred eighty-three".