143222281 has 2 divisors, whose sum is σ = 143222282. Its totient is φ = 143222280.

The previous prime is 143222269. The next prime is 143222291. The reversal of 143222281 is 182222341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135932281 + 7290000 = 11659^2 + 2700^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143222281 is a prime.

It is a super-2 number, since 2×143222281² = 41025243549685922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (143222251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71611140 + 71611141.

It is an arithmetic number, because the mean of its divisors is an integer number (71611141).

Almost surely, 2^143222281 is an apocalyptic number.

It is an amenable number.

143222281 is a deficient number, since it is larger than the sum of its proper divisors (1).

143222281 is an equidigital number, since it uses as much as digits as its factorization.

143222281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1536, while the sum is 25.

The square root of 143222281 is about 11967.5511697256. The cubic root of 143222281 is about 523.2029636807.

The spelling of 143222281 in words is "one hundred forty-three million, two hundred twenty-two thousand, two hundred eighty-one".