154221441 has 16 divisors (see below), whose sum is σ = 224633088. Its totient is φ = 93338000.

The previous prime is 154221421. The next prime is 154221503. The reversal of 154221441 is 144122451.

It is a cyclic number.

It is not a de Polignac number, because 154221441 - 2⁵ = 154221409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (154221421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24466 + ... + 30116.

It is an arithmetic number, because the mean of its divisors is an integer number (14039568).

Almost surely, 2^154221441 is an apocalyptic number.

154221441 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

154221441 is a deficient number, since it is larger than the sum of its proper divisors (70411647).

154221441 is a wasteful number, since it uses less digits than its factorization.

154221441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6492.

The product of its digits is 1280, while the sum is 24.

The square root of 154221441 is about 12418.5925531036. The cubic root of 154221441 is about 536.2676331540.

Adding to 154221441 its reverse (144122451), we get a palindrome (298343892).

The spelling of 154221441 in words is "one hundred fifty-four million, two hundred twenty-one thousand, four hundred forty-one".