146221155 has 24 divisors (see below), whose sum is σ = 253742112. Its totient is φ = 77894784.

The previous prime is 146221139. The next prime is 146221213. The reversal of 146221155 is 551122641.

It is not a de Polignac number, because 146221155 - 2⁴ = 146221139 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60327 + ... + 62703.

It is an arithmetic number, because the mean of its divisors is an integer number (10572588).

Almost surely, 2^146221155 is an apocalyptic number.

146221155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

146221155 is a deficient number, since it is larger than the sum of its proper divisors (107520957).

146221155 is a wasteful number, since it uses less digits than its factorization.

146221155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3755 (or 3752 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 146221155 is about 12092.1939696649. The cubic root of 146221155 is about 526.8294812987.

Adding to 146221155 its reverse (551122641), we get a palindrome (697343796).

The spelling of 146221155 in words is "one hundred forty-six million, two hundred twenty-one thousand, one hundred fifty-five".