145640303 has 4 divisors (see below), whose sum is σ = 145706760. Its totient is φ = 145573848.

The previous prime is 145640273. The next prime is 145640419. The reversal of 145640303 is 303046541.

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 145640303 - 2⁶ = 145640239 is a prime.

It is a super-2 number, since 2×145640303² = 42422195715863618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145640603) 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, 29825 + ... + 34362.

It is an arithmetic number, because the mean of its divisors is an integer number (36426690).

Almost surely, 2^145640303 is an apocalyptic number.

145640303 is a deficient number, since it is larger than the sum of its proper divisors (66457).

145640303 is an equidigital number, since it uses as much as digits as its factorization.

145640303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66456.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 145640303 is about 12068.1524269459. The cubic root of 145640303 is about 526.1309593586.

Adding to 145640303 its reverse (303046541), we get a palindrome (448686844).

The spelling of 145640303 in words is "one hundred forty-five million, six hundred forty thousand, three hundred three".