145430203 has 4 divisors (see below), whose sum is σ = 146870208. Its totient is φ = 143990200.

The previous prime is 145430191. The next prime is 145430293. The reversal of 145430203 is 302034541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 302034541 = 101 ⋅2990441.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145430203 is a prime.

It is a super-2 number, since 2×145430203² = 42299887889242418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145430293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 719851 + ... + 720052.

It is an arithmetic number, because the mean of its divisors is an integer number (36717552).

Almost surely, 2^145430203 is an apocalyptic number.

145430203 is a deficient number, since it is larger than the sum of its proper divisors (1440005).

145430203 is a wasteful number, since it uses less digits than its factorization.

145430203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1440004.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 145430203 is about 12059.4445560316. Note that the first 3 decimals coincide. The cubic root of 145430203 is about 525.8778396067.

Adding to 145430203 its reverse (302034541), we get a palindrome (447464744).

The spelling of 145430203 in words is "one hundred forty-five million, four hundred thirty thousand, two hundred three".