154401223 has 4 divisors (see below), whose sum is σ = 155900368. Its totient is φ = 152902080.

The previous prime is 154401217. The next prime is 154401227. The reversal of 154401223 is 322104451.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-154401223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 154401194 and 154401203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154401227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 749418 + ... + 749623.

It is an arithmetic number, because the mean of its divisors is an integer number (38975092).

Almost surely, 2^154401223 is an apocalyptic number.

154401223 is a deficient number, since it is larger than the sum of its proper divisors (1499145).

154401223 is a wasteful number, since it uses less digits than its factorization.

154401223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1499144.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 154401223 is about 12425.8288657135. The cubic root of 154401223 is about 536.4759349910.

Adding to 154401223 its reverse (322104451), we get a palindrome (476505674).

The spelling of 154401223 in words is "one hundred fifty-four million, four hundred one thousand, two hundred twenty-three".