15041225221 has 4 divisors (see below), whose sum is σ = 16408609344. Its totient is φ = 13673841100.

The previous prime is 15041225219. The next prime is 15041225249. The reversal of 15041225221 is 12252214051.

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 a cyclic number.

It is not a de Polignac number, because 15041225221 - 2¹ = 15041225219 is a prime.

It is a super-2 number, since 2×15041225221² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15041225261) 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, 683692045 + ... + 683692066.

It is an arithmetic number, because the mean of its divisors is an integer number (4102152336).

Almost surely, 2^15041225221 is an apocalyptic number.

15041225221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

15041225221 is a deficient number, since it is larger than the sum of its proper divisors (1367384123).

15041225221 is a wasteful number, since it uses less digits than its factorization.

15041225221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1367384122.

The product of its (nonzero) digits is 1600, while the sum is 25.

Adding to 15041225221 its reverse (12252214051), we get a palindrome (27293439272).

The spelling of 15041225221 in words is "fifteen billion, forty-one million, two hundred twenty-five thousand, two hundred twenty-one".