145122532321 has 6 divisors (see below), whose sum is σ = 157144517430. Its totient is φ = 133959260448.

The previous prime is 145122532307. The next prime is 145122532351. The reversal of 145122532321 is 123235221541.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 16894800400 + 128227731921 = 129980^2 + 358089^2 .

It is a de Polignac number, because none of the positive numbers 2^k-145122532321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145122532351) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 429356436 + ... + 429356773.

It is an arithmetic number, because the mean of its divisors is an integer number (26190752905).

Almost surely, 2^145122532321 is an apocalyptic number.

It is an amenable number.

145122532321 is a deficient number, since it is larger than the sum of its proper divisors (12021985109).

145122532321 is an equidigital number, since it uses as much as digits as its factorization.

145122532321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858713235 (or 858713222 counting only the distinct ones).

The product of its digits is 14400, while the sum is 31.

Adding to 145122532321 its reverse (123235221541), we get a palindrome (268357753862).

The spelling of 145122532321 in words is "one hundred forty-five billion, one hundred twenty-two million, five hundred thirty-two thousand, three hundred twenty-one".