1319436221 has 2 divisors, whose sum is σ = 1319436222. Its totient is φ = 1319436220.

The previous prime is 1319436203. The next prime is 1319436253. The reversal of 1319436221 is 1226349131.

It is an a-pointer prime, because the next prime (1319436253) can be obtained adding 1319436221 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1238688025 + 80748196 = 35195^2 + 8986^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1319436221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1319433221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659718110 + 659718111.

It is an arithmetic number, because the mean of its divisors is an integer number (659718111).

Almost surely, 2^1319436221 is an apocalyptic number.

It is an amenable number.

1319436221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1319436221 is an equidigital number, since it uses as much as digits as its factorization.

1319436221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 32.

The square root of 1319436221 is about 36324.0446674100. The cubic root of 1319436221 is about 1096.8051155829.

The spelling of 1319436221 in words is "one billion, three hundred nineteen million, four hundred thirty-six thousand, two hundred twenty-one".