19223081 has 2 divisors, whose sum is σ = 19223082. Its totient is φ = 19223080.

The previous prime is 19223077. The next prime is 19223111. The reversal of 19223081 is 18032291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16679056 + 2544025 = 4084^2 + 1595^2 .

It is a cyclic number.

It is not a de Polignac number, because 19223081 - 2² = 19223077 is a prime.

It is a super-3 number, since 3×19223081³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 19223081.

It is not a weakly prime, because it can be changed into another prime (19223051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9611540 + 9611541.

It is an arithmetic number, because the mean of its divisors is an integer number (9611541).

Almost surely, 2^19223081 is an apocalyptic number.

It is an amenable number.

19223081 is a deficient number, since it is larger than the sum of its proper divisors (1).

19223081 is an equidigital number, since it uses as much as digits as its factorization.

19223081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 19223081 is about 4384.4134157262. The cubic root of 19223081 is about 267.8804369397.

The spelling of 19223081 in words is "nineteen million, two hundred twenty-three thousand, eighty-one".