4291221173 has 2 divisors, whose sum is σ = 4291221174. Its totient is φ = 4291221172.

The previous prime is 4291221169. The next prime is 4291221203. The reversal of 4291221173 is 3711221924.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2372956369 + 1918264804 = 48713^2 + 43798^2 .

It is a cyclic number.

It is not a de Polignac number, because 4291221173 - 2² = 4291221169 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4291211173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2145610586 + 2145610587.

It is an arithmetic number, because the mean of its divisors is an integer number (2145610587).

Almost surely, 2^4291221173 is an apocalyptic number.

It is an amenable number.

4291221173 is a deficient number, since it is larger than the sum of its proper divisors (1).

4291221173 is an equidigital number, since it uses as much as digits as its factorization.

4291221173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 32.

The square root of 4291221173 is about 65507.4131148529. The cubic root of 4291221173 is about 1625.0259464733.

The spelling of 4291221173 in words is "four billion, two hundred ninety-one million, two hundred twenty-one thousand, one hundred seventy-three".