154015220421 has 8 divisors (see below), whose sum is σ = 228170696960. Its totient is φ = 102676813596.

The previous prime is 154015220407. The next prime is 154015220449. The reversal of 154015220421 is 124022510451.

It is a happy number.

154015220421 is a `hidden beast` number, since 1 + 5 + 4 + 0 + 15 + 220 + 421 = 666.

It is not a de Polignac number, because 154015220421 - 2²⁹ = 153478349509 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 5704267423 = 154015220421 / (1 + 5 + 4 + 0 + 1 + 5 + 2 + 2 + 0 + 4 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154015210421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2852133685 + ... + 2852133738.

It is an arithmetic number, because the mean of its divisors is an integer number (28521337120).

Almost surely, 2^154015220421 is an apocalyptic number.

It is an amenable number.

154015220421 is a deficient number, since it is larger than the sum of its proper divisors (74155476539).

154015220421 is an equidigital number, since it uses as much as digits as its factorization.

154015220421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5704267432 (or 5704267426 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

Adding to 154015220421 its reverse (124022510451), we get a palindrome (278037730872).

The spelling of 154015220421 in words is "one hundred fifty-four billion, fifteen million, two hundred twenty thousand, four hundred twenty-one".