144621233 has 2 divisors, whose sum is σ = 144621234. Its totient is φ = 144621232.

The previous prime is 144621223. The next prime is 144621241. The reversal of 144621233 is 332126441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107081104 + 37540129 = 10348^2 + 6127^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144621233 is a prime.

It is not a weakly prime, because it can be changed into another prime (144621203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72310616 + 72310617.

It is an arithmetic number, because the mean of its divisors is an integer number (72310617).

Almost surely, 2^144621233 is an apocalyptic number.

It is an amenable number.

144621233 is a deficient number, since it is larger than the sum of its proper divisors (1).

144621233 is an equidigital number, since it uses as much as digits as its factorization.

144621233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 26.

The square root of 144621233 is about 12025.8568509691. The cubic root of 144621233 is about 524.9009433672.

Adding to 144621233 its reverse (332126441), we get a palindrome (476747674).

The spelling of 144621233 in words is "one hundred forty-four million, six hundred twenty-one thousand, two hundred thirty-three".