221431141 has 2 divisors, whose sum is σ = 221431142. Its totient is φ = 221431140.

The previous prime is 221431127. The next prime is 221431169. The reversal of 221431141 is 141134122.

221431141 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 213890625 + 7540516 = 14625^2 + 2746^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221431141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221431541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110715570 + 110715571.

It is an arithmetic number, because the mean of its divisors is an integer number (110715571).

Almost surely, 2^221431141 is an apocalyptic number.

It is an amenable number.

221431141 is a deficient number, since it is larger than the sum of its proper divisors (1).

221431141 is an equidigital number, since it uses as much as digits as its factorization.

221431141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 192, while the sum is 19.

The square root of 221431141 is about 14880.5625229694. The cubic root of 221431141 is about 604.9872647184.

Adding to 221431141 its reverse (141134122), we get a palindrome (362565263).

The spelling of 221431141 in words is "two hundred twenty-one million, four hundred thirty-one thousand, one hundred forty-one".