154221512 has 16 divisors (see below), whose sum is σ = 289311360. Its totient is φ = 77071824.

The previous prime is 154221503. The next prime is 154221517. The reversal of 154221512 is 215122451.

154221512 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×154221512² = 47568549527132288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (154221517) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 18653 + ... + 25619.

It is an arithmetic number, because the mean of its divisors is an integer number (18081960).

Almost surely, 2^154221512 is an apocalyptic number.

It is an amenable number.

154221512 is a deficient number, since it is larger than the sum of its proper divisors (135089848).

154221512 is a wasteful number, since it uses less digits than its factorization.

154221512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9740 (or 9736 counting only the distinct ones).

The product of its digits is 800, while the sum is 23.

The square root of 154221512 is about 12418.5954117203. The cubic root of 154221512 is about 536.2677154490.

Adding to 154221512 its reverse (215122451), we get a palindrome (369343963).

The spelling of 154221512 in words is "one hundred fifty-four million, two hundred twenty-one thousand, five hundred twelve".