15205434213 has 4 divisors (see below), whose sum is σ = 20273912288. Its totient is φ = 10136956140.

The previous prime is 15205434203. The next prime is 15205434221. The reversal of 15205434213 is 31243450251.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 15205434213 - 2⁶ = 15205434149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15205434203) 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, 2534239033 + ... + 2534239038.

It is an arithmetic number, because the mean of its divisors is an integer number (5068478072).

Almost surely, 2^15205434213 is an apocalyptic number.

It is an amenable number.

15205434213 is a deficient number, since it is larger than the sum of its proper divisors (5068478075).

15205434213 is an equidigital number, since it uses as much as digits as its factorization.

15205434213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5068478074.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 15205434213 its reverse (31243450251), we get a palindrome (46448884464).

The spelling of 15205434213 in words is "fifteen billion, two hundred five million, four hundred thirty-four thousand, two hundred thirteen".