145204021224 has 64 divisors (see below), whose sum is σ = 403389014400. Its totient is φ = 48395999232.

The previous prime is 145204021223. The next prime is 145204021247. The reversal of 145204021224 is 422120402541.

It is a happy number.

145204021224 is a `hidden beast` number, since 14 + 5 + 20 + 402 + 1 + 224 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (145204021223) 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, 2250664 + ... + 2314280.

It is an arithmetic number, because the mean of its divisors is an integer number (6302953350).

Almost surely, 2^145204021224 is an apocalyptic number.

It is an amenable number.

145204021224 is an abundant number, since it is smaller than the sum of its proper divisors (258184993176).

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

145204021224 is a wasteful number, since it uses less digits than its factorization.

145204021224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74199 (or 74189 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

Adding to 145204021224 its reverse (422120402541), we get a palindrome (567324423765).

The spelling of 145204021224 in words is "one hundred forty-five billion, two hundred four million, twenty-one thousand, two hundred twenty-four".