145503313021 has 8 divisors (see below), whose sum is σ = 168067998144. Its totient is φ = 124494813120.

The previous prime is 145503312989. The next prime is 145503313051. The reversal of 145503313021 is 120313305541.

It is a happy number.

145503313021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145503313021 - 2⁵ = 145503312989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145503313051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 389046105 + ... + 389046478.

It is an arithmetic number, because the mean of its divisors is an integer number (21008499768).

Almost surely, 2^145503313021 is an apocalyptic number.

145503313021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

145503313021 is a deficient number, since it is larger than the sum of its proper divisors (22564685123).

145503313021 is a wasteful number, since it uses less digits than its factorization.

145503313021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778092611.

The product of its (nonzero) digits is 5400, while the sum is 28.

Adding to 145503313021 its reverse (120313305541), we get a palindrome (265816618562).

The spelling of 145503313021 in words is "one hundred forty-five billion, five hundred three million, three hundred thirteen thousand, twenty-one".