145220221143 has 16 divisors (see below), whose sum is σ = 218667973600. Its totient is φ = 95226373440.

The previous prime is 145220221123. The next prime is 145220221189. The reversal of 145220221143 is 341122022541.

145220221143 is a `hidden beast` number, since 1 + 4 + 522 + 0 + 22 + 114 + 3 = 666.

It is not a de Polignac number, because 145220221143 - 2²⁵ = 145186666711 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145220221123) 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, 44084638 + ... + 44087931.

It is an arithmetic number, because the mean of its divisors is an integer number (13666748350).

Almost surely, 2^145220221143 is an apocalyptic number.

145220221143 is a deficient number, since it is larger than the sum of its proper divisors (73447752457).

145220221143 is an equidigital number, since it uses as much as digits as its factorization.

145220221143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88172639 (or 88172633 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 145220221143 its reverse (341122022541), we get a palindrome (486342243684).

The spelling of 145220221143 in words is "one hundred forty-five billion, two hundred twenty million, two hundred twenty-one thousand, one hundred forty-three".