145421333243 has 4 divisors (see below), whose sum is σ = 145422466248. Its totient is φ = 145420200240.

The previous prime is 145421333221. The next prime is 145421333251. The reversal of 145421333243 is 342333124541.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 342333124541 = 20753 ⋅16495597.

It is a cyclic number.

It is not a de Polignac number, because 145421333243 - 2¹⁰ = 145421332219 is a prime.

It is a super-2 number, since 2×145421333243² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145421333293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 345146 + ... + 640287.

It is an arithmetic number, because the mean of its divisors is an integer number (36355616562).

Almost surely, 2^145421333243 is an apocalyptic number.

145421333243 is a deficient number, since it is larger than the sum of its proper divisors (1133005).

145421333243 is an equidigital number, since it uses as much as digits as its factorization.

145421333243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1133004.

The product of its digits is 103680, while the sum is 35.

Adding to 145421333243 its reverse (342333124541), we get a palindrome (487754457784).

The spelling of 145421333243 in words is "one hundred forty-five billion, four hundred twenty-one million, three hundred thirty-three thousand, two hundred forty-three".