221341431 has 8 divisors (see below), whose sum is σ = 310654720. Its totient is φ = 139794552.

The previous prime is 221341429. The next prime is 221341433. The reversal of 221341431 is 134143122.

It is an interprime number because it is at equal distance from previous prime (221341429) and next prime (221341433).

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

It is not a de Polignac number, because 221341431 - 2¹ = 221341429 is a prime.

It is a super-2 number, since 2×221341431² = 97984058154255522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221341398 and 221341407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221341433) 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, 1941535 + ... + 1941648.

It is an arithmetic number, because the mean of its divisors is an integer number (38831840).

Almost surely, 2^221341431 is an apocalyptic number.

221341431 is a deficient number, since it is larger than the sum of its proper divisors (89313289).

221341431 is a wasteful number, since it uses less digits than its factorization.

221341431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3883205.

The product of its digits is 576, while the sum is 21.

The square root of 221341431 is about 14877.5478826317. The cubic root of 221341431 is about 604.9055527268.

Adding to 221341431 its reverse (134143122), we get a palindrome (355484553).

The spelling of 221341431 in words is "two hundred twenty-one million, three hundred forty-one thousand, four hundred thirty-one".