154421223 has 32 divisors (see below), whose sum is σ = 229485312. Its totient is φ = 91584000.

The previous prime is 154421209. The next prime is 154421243. The reversal of 154421223 is 322124451.

It is not a de Polignac number, because 154421223 - 2⁶ = 154421159 is a prime.

It is a super-2 number, since 2×154421223² = 47691828225631458, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 154421193 and 154421202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154421243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 356415 + ... + 356847.

It is an arithmetic number, because the mean of its divisors is an integer number (7171416).

Almost surely, 2^154421223 is an apocalyptic number.

154421223 is a deficient number, since it is larger than the sum of its proper divisors (75064089).

154421223 is a wasteful number, since it uses less digits than its factorization.

154421223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655.

The product of its digits is 1920, while the sum is 24.

The square root of 154421223 is about 12426.6336149417. The cubic root of 154421223 is about 536.4990977079.

Adding to 154421223 its reverse (322124451), we get a palindrome (476545674).

The spelling of 154421223 in words is "one hundred fifty-four million, four hundred twenty-one thousand, two hundred twenty-three".