15220401205 has 4 divisors (see below), whose sum is σ = 18264481452. Its totient is φ = 12176320960.

The previous prime is 15220401187. The next prime is 15220401227. The reversal of 15220401205 is 50210402251.

15220401205 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 2739266244 + 12481134961 = 52338^2 + 111719^2 .

It is not a de Polignac number, because 15220401205 - 2¹¹ = 15220399157 is a prime.

It is a super-2 number, since 2×15220401205² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 1522040116 + ... + 1522040125.

It is an arithmetic number, because the mean of its divisors is an integer number (4566120363).

Almost surely, 2^15220401205 is an apocalyptic number.

It is an amenable number.

15220401205 is a deficient number, since it is larger than the sum of its proper divisors (3044080247).

15220401205 is an equidigital number, since it uses as much as digits as its factorization.

15220401205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3044080246.

The product of its (nonzero) digits is 800, while the sum is 22.

Adding to 15220401205 its reverse (50210402251), we get a palindrome (65430803456).

The spelling of 15220401205 in words is "fifteen billion, two hundred twenty million, four hundred one thousand, two hundred five".