2245319981 has 2 divisors, whose sum is σ = 2245319982. Its totient is φ = 2245319980.

The previous prime is 2245319963. The next prime is 2245320001. The reversal of 2245319981 is 1899135422.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1234397956 + 1010922025 = 35134^2 + 31795^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2245319981 is a prime.

It is a super-2 number, since 2×2245319981² = 10082923634155680722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2245319381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1122659990 + 1122659991.

It is an arithmetic number, because the mean of its divisors is an integer number (1122659991).

Almost surely, 2^2245319981 is an apocalyptic number.

It is an amenable number.

2245319981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2245319981 is an equidigital number, since it uses as much as digits as its factorization.

2245319981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 44.

The square root of 2245319981 is about 47384.8074914313. The cubic root of 2245319981 is about 1309.4615390889.

The spelling of 2245319981 in words is "two billion, two hundred forty-five million, three hundred nineteen thousand, nine hundred eighty-one".