1082378221 has 2 divisors, whose sum is σ = 1082378222. Its totient is φ = 1082378220.

The previous prime is 1082378203. The next prime is 1082378251. The reversal of 1082378221 is 1228732801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 961620100 + 120758121 = 31010^2 + 10989^2 .

It is a cyclic number.

It is not a de Polignac number, because 1082378221 - 2⁵ = 1082378189 is a prime.

It is a super-2 number, since 2×1082378221² = 2343085226590249682, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1082378251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 541189110 + 541189111.

It is an arithmetic number, because the mean of its divisors is an integer number (541189111).

Almost surely, 2^1082378221 is an apocalyptic number.

It is an amenable number.

1082378221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1082378221 is an equidigital number, since it uses as much as digits as its factorization.

1082378221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 1082378221 is about 32899.5170329292. The cubic root of 1082378221 is about 1026.7381086204.

The spelling of 1082378221 in words is "one billion, eighty-two million, three hundred seventy-eight thousand, two hundred twenty-one".