154834221 has 8 divisors (see below), whose sum is σ = 206506144. Its totient is φ = 103192560.

The previous prime is 154834201. The next prime is 154834223. The reversal of 154834221 is 122438451.

154834221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 154834221 - 2⁶ = 154834157 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 (154834223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10626 + ... + 20556.

It is an arithmetic number, because the mean of its divisors is an integer number (25813268).

Almost surely, 2^154834221 is an apocalyptic number.

It is an amenable number.

154834221 is a deficient number, since it is larger than the sum of its proper divisors (51671923).

154834221 is an equidigital number, since it uses as much as digits as its factorization.

154834221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15131.

The product of its digits is 7680, while the sum is 30.

The square root of 154834221 is about 12443.2399719687. The cubic root of 154834221 is about 536.9769590869.

The spelling of 154834221 in words is "one hundred fifty-four million, eight hundred thirty-four thousand, two hundred twenty-one".