145502220171 has 64 divisors (see below), whose sum is σ = 245941272576. Its totient is φ = 74325081600.

The previous prime is 145502220167. The next prime is 145502220179. The reversal of 145502220171 is 171022205541.

It is a happy number.

It is not a de Polignac number, because 145502220171 - 2² = 145502220167 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145502220179) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3293136 + ... + 3337026.

It is an arithmetic number, because the mean of its divisors is an integer number (3842832384).

Almost surely, 2^145502220171 is an apocalyptic number.

145502220171 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

145502220171 is a deficient number, since it is larger than the sum of its proper divisors (100439052405).

145502220171 is a wasteful number, since it uses less digits than its factorization.

145502220171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44152.

The product of its (nonzero) digits is 5600, while the sum is 30.

The spelling of 145502220171 in words is "one hundred forty-five billion, five hundred two million, two hundred twenty thousand, one hundred seventy-one".