154221132 has 48 divisors (see below), whose sum is σ = 390156032. Its totient is φ = 47131200.

The previous prime is 154221121. The next prime is 154221163. The reversal of 154221132 is 231122451.

154221132 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 2×154221132² = 47568315110722848, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 154221099 and 154221108.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20283 + ... + 26829.

Almost surely, 2^154221132 is an apocalyptic number.

154221132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 154221132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195078016).

154221132 is an abundant number, since it is smaller than the sum of its proper divisors (235934900).

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

154221132 is a wasteful number, since it uses less digits than its factorization.

154221132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6718 (or 6716 counting only the distinct ones).

The product of its digits is 480, while the sum is 21.

The square root of 154221132 is about 12418.5801120740. The cubic root of 154221132 is about 536.2672749962.

Adding to 154221132 its reverse (231122451), we get a palindrome (385343583).

The spelling of 154221132 in words is "one hundred fifty-four million, two hundred twenty-one thousand, one hundred thirty-two".