145544403 has 4 divisors (see below), whose sum is σ = 194059208. Its totient is φ = 97029600.

The previous prime is 145544369. The next prime is 145544419. The reversal of 145544403 is 304445541.

145544403 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 de Polignac number, because none of the positive numbers 2^k-145544403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145544423) 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, 24257398 + ... + 24257403.

It is an arithmetic number, because the mean of its divisors is an integer number (48514802).

Almost surely, 2^145544403 is an apocalyptic number.

145544403 is a deficient number, since it is larger than the sum of its proper divisors (48514805).

145544403 is an equidigital number, since it uses as much as digits as its factorization.

145544403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48514804.

The product of its (nonzero) digits is 19200, while the sum is 30.

The square root of 145544403 is about 12064.1785049791. The cubic root of 145544403 is about 526.0154532415.

Adding to 145544403 its reverse (304445541), we get a palindrome (449989944).

The spelling of 145544403 in words is "one hundred forty-five million, five hundred forty-four thousand, four hundred three".