145221332 has 24 divisors (see below), whose sum is σ = 267909600. Its totient is φ = 68687136.

The previous prime is 145221331. The next prime is 145221367. The reversal of 145221332 is 233122541.

It is a junction number, because it is equal to n+sod(n) for n = 145221298 and 145221307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145221331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83423 + ... + 85145.

It is an arithmetic number, because the mean of its divisors is an integer number (11162900).

Almost surely, 2^145221332 is an apocalyptic number.

It is an amenable number.

145221332 is a deficient number, since it is larger than the sum of its proper divisors (122688268).

145221332 is a wasteful number, since it uses less digits than its factorization.

145221332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2855 (or 2853 counting only the distinct ones).

The product of its digits is 1440, while the sum is 23.

The square root of 145221332 is about 12050.7813854538. The cubic root of 145221332 is about 525.6259587379.

Adding to 145221332 its reverse (233122541), we get a palindrome (378343873).

The spelling of 145221332 in words is "one hundred forty-five million, two hundred twenty-one thousand, three hundred thirty-two".