145135432221 has 16 divisors (see below), whose sum is σ = 219367995840. Its totient is φ = 84613368960.

The previous prime is 145135432219. The next prime is 145135432223. The reversal of 145135432221 is 122234531541.

It is an interprime number because it is at equal distance from previous prime (145135432219) and next prime (145135432223).

It is not a de Polignac number, because 145135432221 - 2¹ = 145135432219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145135432223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97931400 + ... + 97932881.

It is an arithmetic number, because the mean of its divisors is an integer number (13710499740).

Almost surely, 2^145135432221 is an apocalyptic number.

It is an amenable number.

145135432221 is a deficient number, since it is larger than the sum of its proper divisors (74232563619).

145135432221 is a wasteful number, since it uses less digits than its factorization.

145135432221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195864316.

The product of its digits is 28800, while the sum is 33.

Adding to 145135432221 its reverse (122234531541), we get a palindrome (267369963762).

The spelling of 145135432221 in words is "one hundred forty-five billion, one hundred thirty-five million, four hundred thirty-two thousand, two hundred twenty-one".