154213322521 has 8 divisors (see below), whose sum is σ = 171878626080. Its totient is φ = 137502900288.

The previous prime is 154213322503. The next prime is 154213322531. The reversal of 154213322521 is 125223312451.

It is a happy number.

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

It is not a de Polignac number, because 154213322521 - 2⁹ = 154213322009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154213322531) 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, 238719991 + ... + 238720636.

It is an arithmetic number, because the mean of its divisors is an integer number (21484828260).

Almost surely, 2^154213322521 is an apocalyptic number.

It is an amenable number.

154213322521 is a deficient number, since it is larger than the sum of its proper divisors (17665303559).

154213322521 is a wasteful number, since it uses less digits than its factorization.

154213322521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477440663.

The product of its digits is 14400, while the sum is 31.

Adding to 154213322521 its reverse (125223312451), we get a palindrome (279436634972).

The spelling of 154213322521 in words is "one hundred fifty-four billion, two hundred thirteen million, three hundred twenty-two thousand, five hundred twenty-one".