154425221 has 12 divisors (see below), whose sum is σ = 160520256. Its totient is φ = 148493520.

The previous prime is 154425143. The next prime is 154425241. The reversal of 154425221 is 122524451.

It is not a de Polignac number, because 154425221 - 2¹⁰ = 154424197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154425241) 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 11 ways as a sum of consecutive naturals, for example, 174446 + ... + 175328.

It is an arithmetic number, because the mean of its divisors is an integer number (13376688).

Almost surely, 2^154425221 is an apocalyptic number.

It is an amenable number.

154425221 is a deficient number, since it is larger than the sum of its proper divisors (6095035).

154425221 is an frugal number, since it uses more digits than its factorization.

154425221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1052 (or 991 counting only the distinct ones).

The product of its digits is 3200, while the sum is 26.

The square root of 154425221 is about 12426.7944780623. The cubic root of 154425221 is about 536.5037276951.

Adding to 154425221 its reverse (122524451), we get a palindrome (276949672).

The spelling of 154425221 in words is "one hundred fifty-four million, four hundred twenty-five thousand, two hundred twenty-one".