141555221 has 2 divisors, whose sum is σ = 141555222. Its totient is φ = 141555220.

The previous prime is 141555217. The next prime is 141555223. The reversal of 141555221 is 122555141.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95844100 + 45711121 = 9790^2 + 6761^2 .

It is an emirp because it is prime and its reverse (122555141) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 141555221 - 2² = 141555217 is a prime.

Together with 141555223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (141555223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70777610 + 70777611.

It is an arithmetic number, because the mean of its divisors is an integer number (70777611).

Almost surely, 2^141555221 is an apocalyptic number.

It is an amenable number.

141555221 is a deficient number, since it is larger than the sum of its proper divisors (1).

141555221 is an equidigital number, since it uses as much as digits as its factorization.

141555221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2000, while the sum is 26.

The square root of 141555221 is about 11897.6981387157. The cubic root of 141555221 is about 521.1650664522.

The spelling of 141555221 in words is "one hundred forty-one million, five hundred fifty-five thousand, two hundred twenty-one".