145505223131 has 4 divisors (see below), whose sum is σ = 145663554000. Its totient is φ = 145346892264.

The previous prime is 145505223119. The next prime is 145505223133. The reversal of 145505223131 is 131322505541.

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 145505223131 - 2⁶ = 145505223067 is a prime.

It is a super-2 number, since 2×145505223131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145505223133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79164056 + ... + 79165893.

It is an arithmetic number, because the mean of its divisors is an integer number (36415888500).

Almost surely, 2^145505223131 is an apocalyptic number.

145505223131 is a deficient number, since it is larger than the sum of its proper divisors (158330869).

145505223131 is an equidigital number, since it uses as much as digits as its factorization.

145505223131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158330868.

The product of its (nonzero) digits is 18000, while the sum is 32.

Adding to 145505223131 its reverse (131322505541), we get a palindrome (276827728672).

The spelling of 145505223131 in words is "one hundred forty-five billion, five hundred five million, two hundred twenty-three thousand, one hundred thirty-one".