145221116055 has 16 divisors (see below), whose sum is σ = 232409780064. Its totient is φ = 77432597120.

The previous prime is 145221116011. The next prime is 145221116059. The reversal of 145221116055 is 550611122541.

It is a happy number.

It is not a de Polignac number, because 145221116055 - 2²⁸ = 144952680599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145221116059) 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, 1102116 + ... + 1226825.

It is an arithmetic number, because the mean of its divisors is an integer number (14525611254).

Almost surely, 2^145221116055 is an apocalyptic number.

145221116055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

145221116055 is a deficient number, since it is larger than the sum of its proper divisors (87188664009).

145221116055 is a wasteful number, since it uses less digits than its factorization.

145221116055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2333106.

The product of its (nonzero) digits is 12000, while the sum is 33.

Adding to 145221116055 its reverse (550611122541), we get a palindrome (695832238596).

The spelling of 145221116055 in words is "one hundred forty-five billion, two hundred twenty-one million, one hundred sixteen thousand, fifty-five".