1844471221 has 2 divisors, whose sum is σ = 1844471222. Its totient is φ = 1844471220.

The previous prime is 1844471183. The next prime is 1844471273. The reversal of 1844471221 is 1221744481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1691676900 + 152794321 = 41130^2 + 12361^2 .

It is a cyclic number.

It is not a de Polignac number, because 1844471221 - 2⁷ = 1844471093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1844471281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 922235610 + 922235611.

It is an arithmetic number, because the mean of its divisors is an integer number (922235611).

Almost surely, 2^1844471221 is an apocalyptic number.

It is an amenable number.

1844471221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1844471221 is an equidigital number, since it uses as much as digits as its factorization.

1844471221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14336, while the sum is 34.

The square root of 1844471221 is about 42947.3074941841. The cubic root of 1844471221 is about 1226.3768987677.

The spelling of 1844471221 in words is "one billion, eight hundred forty-four million, four hundred seventy-one thousand, two hundred twenty-one".