145303313 has 2 divisors, whose sum is σ = 145303314. Its totient is φ = 145303312.

The previous prime is 145303307. The next prime is 145303337. The reversal of 145303313 is 313303541.

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., 124032769 + 21270544 = 11137^2 + 4612^2 .

It is an emirp because it is prime and its reverse (313303541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145303313 - 2¹⁶ = 145237777 is a prime.

It is a super-2 number, since 2×145303313² = 42226105537551938, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (145303813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72651656 + 72651657.

It is an arithmetic number, because the mean of its divisors is an integer number (72651657).

Almost surely, 2^145303313 is an apocalyptic number.

It is an amenable number.

145303313 is a deficient number, since it is larger than the sum of its proper divisors (1).

145303313 is an equidigital number, since it uses as much as digits as its factorization.

145303313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 23.

The square root of 145303313 is about 12054.1823862094. The cubic root of 145303313 is about 525.7248497088.

Adding to 145303313 its reverse (313303541), we get a palindrome (458606854).

The spelling of 145303313 in words is "one hundred forty-five million, three hundred three thousand, three hundred thirteen".