154555143421 has 16 divisors (see below), whose sum is σ = 178071773184. Its totient is φ = 131399455104.

The previous prime is 154555143367. The next prime is 154555143439. The reversal of 154555143421 is 124341555451.

It is a cyclic number.

It is not a de Polignac number, because 154555143421 - 2⁹ = 154555142909 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 (154555143461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1096836 + ... + 1229698.

It is an arithmetic number, because the mean of its divisors is an integer number (11129485824).

Almost surely, 2^154555143421 is an apocalyptic number.

It is an amenable number.

154555143421 is a deficient number, since it is larger than the sum of its proper divisors (23516629763).

154555143421 is a wasteful number, since it uses less digits than its factorization.

154555143421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134220.

The product of its digits is 240000, while the sum is 40.

Adding to 154555143421 its reverse (124341555451), we get a palindrome (278896698872).

The spelling of 154555143421 in words is "one hundred fifty-four billion, five hundred fifty-five million, one hundred forty-three thousand, four hundred twenty-one".