145534223420 has 24 divisors (see below), whose sum is σ = 305966463264. Its totient is φ = 58148052416.

The previous prime is 145534223399. The next prime is 145534223437. The reversal of 145534223420 is 24322435541.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4084127 + ... + 4119606.

It is an arithmetic number, because the mean of its divisors is an integer number (12748602636).

Almost surely, 2^145534223420 is an apocalyptic number.

145534223420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145534223420 is an abundant number, since it is smaller than the sum of its proper divisors (160432239844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145534223420 is a wasteful number, since it uses less digits than its factorization.

145534223420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8204629 (or 8204627 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 35.

Adding to 145534223420 its reverse (24322435541), we get a palindrome (169856658961).

The spelling of 145534223420 in words is "one hundred forty-five billion, five hundred thirty-four million, two hundred twenty-three thousand, four hundred twenty".