145213333 has 6 divisors (see below), whose sum is σ = 153258774. Its totient is φ = 137570184.

The previous prime is 145213319. The next prime is 145213361. The reversal of 145213333 is 333312541.

It can be written as a sum of positive squares in only one way, i.e., 82137969 + 63075364 = 9063^2 + 7942^2 .

It is a de Polignac number, because none of the positive numbers 2^k-145213333 is a prime.

It is a super-4 number, since 4×145213333⁴ (a number of 34 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145213298 and 145213307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145213373) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 200766 + ... + 201487.

It is an arithmetic number, because the mean of its divisors is an integer number (25543129).

Almost surely, 2^145213333 is an apocalyptic number.

It is an amenable number.

145213333 is a deficient number, since it is larger than the sum of its proper divisors (8045441).

145213333 is an equidigital number, since it uses as much as digits as its factorization.

145213333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402291 (or 402272 counting only the distinct ones).

The product of its digits is 3240, while the sum is 25.

The square root of 145213333 is about 12050.4494936911. The cubic root of 145213333 is about 525.6163078159.

Adding to 145213333 its reverse (333312541), we get a palindrome (478525874).

The spelling of 145213333 in words is "one hundred forty-five million, two hundred thirteen thousand, three hundred thirty-three".