145722222 has 12 divisors (see below), whose sum is σ = 315731520. Its totient is φ = 48574068.

The previous prime is 145722217. The next prime is 145722223. The reversal of 145722222 is 222227541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145722223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4047822 + ... + 4047857.

It is an arithmetic number, because the mean of its divisors is an integer number (26310960).

Almost surely, 2^145722222 is an apocalyptic number.

145722222 is an abundant number, since it is smaller than the sum of its proper divisors (170009298).

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

145722222 is a wasteful number, since it uses less digits than its factorization.

145722222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8095687 (or 8095684 counting only the distinct ones).

The product of its digits is 4480, while the sum is 27.

The square root of 145722222 is about 12071.5459656168. The cubic root of 145722222 is about 526.2295860043.

Adding to 145722222 its reverse (222227541), we get a palindrome (367949763).

It can be divided in two parts, 14 and 5722222, that multiplied together give a palindrome (80111108).

The spelling of 145722222 in words is "one hundred forty-five million, seven hundred twenty-two thousand, two hundred twenty-two".