154442241421 has 12 divisors (see below), whose sum is σ = 170939125812. Its totient is φ = 138709024128.

The previous prime is 154442241413. The next prime is 154442241463. The reversal of 154442241421 is 124142244451.

It can be written as a sum of positive squares in 6 ways, for example, as 14125322500 + 140316918921 = 118850^2 + 374589^2 .

It is not a de Polignac number, because 154442241421 - 2³ = 154442241413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154442241491) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4321200 + ... + 4356793.

It is an arithmetic number, because the mean of its divisors is an integer number (14244927151).

Almost surely, 2^154442241421 is an apocalyptic number.

It is an amenable number.

154442241421 is a deficient number, since it is larger than the sum of its proper divisors (16496884391).

154442241421 is an equidigital number, since it uses as much as digits as its factorization.

154442241421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8678080 (or 8678043 counting only the distinct ones).

The product of its digits is 40960, while the sum is 34.

Adding to 154442241421 its reverse (124142244451), we get a palindrome (278584485872).

The spelling of 154442241421 in words is "one hundred fifty-four billion, four hundred forty-two million, two hundred forty-one thousand, four hundred twenty-one".