145220223222 has 20 divisors (see below), whose sum is σ = 325400870916. Its totient is φ = 48406741020.

The previous prime is 145220223143. The next prime is 145220223229. The reversal of 145220223222 is 222322022541.

It is a happy number.

145220223222 is a `hidden beast` number, since 1 + 452 + 202 + 2 + 3 + 2 + 2 + 2 = 666.

It is a super-2 number, since 2×145220223222² (a number of 23 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145220223229) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 448210404 + ... + 448210727.

Almost surely, 2^145220223222 is an apocalyptic number.

145220223222 is an abundant number, since it is smaller than the sum of its proper divisors (180180647694).

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

145220223222 is an equidigital number, since it uses as much as digits as its factorization.

145220223222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896421145 (or 896421136 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

Adding to 145220223222 its reverse (222322022541), we get a palindrome (367542245763).

The spelling of 145220223222 in words is "one hundred forty-five billion, two hundred twenty million, two hundred twenty-three thousand, two hundred twenty-two".