15421436117 has 4 divisors (see below), whose sum is σ = 16328579436. Its totient is φ = 14514292800.

The previous prime is 15421436101. The next prime is 15421436123. The reversal of 15421436117 is 71163412451.

15421436117 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11593044241 + 3828391876 = 107671^2 + 61874^2 .

It is a cyclic number.

It is not a de Polignac number, because 15421436117 - 2⁴ = 15421436101 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 (15421436417) 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 3 ways as a sum of consecutive naturals, for example, 453571634 + ... + 453571667.

It is an arithmetic number, because the mean of its divisors is an integer number (4082144859).

Almost surely, 2^15421436117 is an apocalyptic number.

15421436117 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

15421436117 is a deficient number, since it is larger than the sum of its proper divisors (907143319).

15421436117 is an equidigital number, since it uses as much as digits as its factorization.

15421436117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907143318.

The product of its digits is 20160, while the sum is 35.

Adding to 15421436117 its reverse (71163412451), we get a palindrome (86584848568).

The spelling of 15421436117 in words is "fifteen billion, four hundred twenty-one million, four hundred thirty-six thousand, one hundred seventeen".