1873254221 has 2 divisors, whose sum is σ = 1873254222. Its totient is φ = 1873254220.

The previous prime is 1873254209. The next prime is 1873254247. The reversal of 1873254221 is 1224523781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1669621321 + 203632900 = 40861^2 + 14270^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1873254221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1873254421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 936627110 + 936627111.

It is an arithmetic number, because the mean of its divisors is an integer number (936627111).

Almost surely, 2^1873254221 is an apocalyptic number.

It is an amenable number.

1873254221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1873254221 is an equidigital number, since it uses as much as digits as its factorization.

1873254221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26880, while the sum is 35.

The square root of 1873254221 is about 43281.1069752149. The cubic root of 1873254221 is about 1232.7232106598.

The spelling of 1873254221 in words is "one billion, eight hundred seventy-three million, two hundred fifty-four thousand, two hundred twenty-one".