145533222 has 12 divisors (see below), whose sum is σ = 315322020. Its totient is φ = 48511068.

The previous prime is 145533221. The next prime is 145533229. The reversal of 145533222 is 222335541.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145533221) 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, 4042572 + ... + 4042607.

It is an arithmetic number, because the mean of its divisors is an integer number (26276835).

Almost surely, 2^145533222 is an apocalyptic number.

145533222 is an abundant number, since it is smaller than the sum of its proper divisors (169788798).

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

145533222 is a wasteful number, since it uses less digits than its factorization.

145533222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8085187 (or 8085184 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 145533222 is about 12063.7150994211. The cubic root of 145533222 is about 526.0019830582.

Adding to 145533222 its reverse (222335541), we get a palindrome (367868763).

The spelling of 145533222 in words is "one hundred forty-five million, five hundred thirty-three thousand, two hundred twenty-two".