1154433221 has 2 divisors, whose sum is σ = 1154433222. Its totient is φ = 1154433220.

The previous prime is 1154433209. The next prime is 1154433239. The reversal of 1154433221 is 1223344511.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1100248900 + 54184321 = 33170^2 + 7361^2 .

It is a cyclic number.

It is not a de Polignac number, because 1154433221 - 2¹⁰ = 1154432197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1154433251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577216610 + 577216611.

It is an arithmetic number, because the mean of its divisors is an integer number (577216611).

Almost surely, 2^1154433221 is an apocalyptic number.

It is an amenable number.

1154433221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1154433221 is an equidigital number, since it uses as much as digits as its factorization.

1154433221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 26.

The square root of 1154433221 is about 33976.9513199757. The cubic root of 1154433221 is about 1049.0340991877.

Adding to 1154433221 its reverse (1223344511), we get a palindrome (2377777732).

The spelling of 1154433221 in words is "one billion, one hundred fifty-four million, four hundred thirty-three thousand, two hundred twenty-one".