154055021 has 4 divisors (see below), whose sum is σ = 162163200. Its totient is φ = 145946844.

The previous prime is 154055009. The next prime is 154055063. The reversal of 154055021 is 120550451.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 154055021 - 2¹⁰ = 154053997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154055621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4054061 + ... + 4054098.

It is an arithmetic number, because the mean of its divisors is an integer number (40540800).

Almost surely, 2^154055021 is an apocalyptic number.

It is an amenable number.

154055021 is a deficient number, since it is larger than the sum of its proper divisors (8108179).

154055021 is an equidigital number, since it uses as much as digits as its factorization.

154055021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8108178.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 154055021 is about 12411.8903072820. The cubic root of 154055021 is about 536.0746686743.

The spelling of 154055021 in words is "one hundred fifty-four million, fifty-five thousand, twenty-one".