145521203 has 4 divisors (see below), whose sum is σ = 145596000. Its totient is φ = 145446408.

The previous prime is 145521191. The next prime is 145521221. The reversal of 145521203 is 302125541.

145521203 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 145521203 - 2¹² = 145517107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145521293) 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, 34400 + ... + 38397.

It is an arithmetic number, because the mean of its divisors is an integer number (36399000).

Almost surely, 2^145521203 is an apocalyptic number.

145521203 is a deficient number, since it is larger than the sum of its proper divisors (74797).

145521203 is an equidigital number, since it uses as much as digits as its factorization.

145521203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74796.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 145521203 is about 12063.2169424246. The cubic root of 145521203 is about 525.9875025343.

Adding to 145521203 its reverse (302125541), we get a palindrome (447646744).

The spelling of 145521203 in words is "one hundred forty-five million, five hundred twenty-one thousand, two hundred three".