154155010421 has 4 divisors (see below), whose sum is σ = 158321362092. Its totient is φ = 149988658752.

The previous prime is 154155010409. The next prime is 154155010439. The reversal of 154155010421 is 124010551451.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 141741708196 + 12413302225 = 376486^2 + 111415^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-154155010421 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 (154155010921) 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, 2083175780 + ... + 2083175853.

It is an arithmetic number, because the mean of its divisors is an integer number (39580340523).

Almost surely, 2^154155010421 is an apocalyptic number.

It is an amenable number.

154155010421 is a deficient number, since it is larger than the sum of its proper divisors (4166351671).

154155010421 is an equidigital number, since it uses as much as digits as its factorization.

154155010421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4166351670.

The product of its (nonzero) digits is 4000, while the sum is 29.

Adding to 154155010421 its reverse (124010551451), we get a palindrome (278165561872).

The spelling of 154155010421 in words is "one hundred fifty-four billion, one hundred fifty-five million, ten thousand, four hundred twenty-one".