223801649 has 2 divisors, whose sum is σ = 223801650. Its totient is φ = 223801648.

The previous prime is 223801621. The next prime is 223801663. The reversal of 223801649 is 946108322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 223801600 + 49 = 14960^2 + 7^2 .

It is a cyclic number.

It is not a de Polignac number, because 223801649 - 2¹⁶ = 223736113 is a prime.

It is a super-3 number, since 3×223801649³ (a number of 26 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (223801609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111900824 + 111900825.

It is an arithmetic number, because the mean of its divisors is an integer number (111900825).

Almost surely, 2^223801649 is an apocalyptic number.

It is an amenable number.

223801649 is a deficient number, since it is larger than the sum of its proper divisors (1).

223801649 is an equidigital number, since it uses as much as digits as its factorization.

223801649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 223801649 is about 14960.0016377004. The cubic root of 223801649 is about 607.1384823728.

It can be divided in two parts, 2238016 and 49, that multiplied together give a square (109662784 = 10472²).

The spelling of 223801649 in words is "two hundred twenty-three million, eight hundred one thousand, six hundred forty-nine".