15540445222 has 8 divisors (see below), whose sum is σ = 23393038536. Its totient is φ = 7742765712.

The previous prime is 15540445201. The next prime is 15540445223. The reversal of 15540445222 is 22254404551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15540445223) 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, 13727743 + ... + 13728874.

It is an arithmetic number, because the mean of its divisors is an integer number (2924129817).

Almost surely, 2^15540445222 is an apocalyptic number.

15540445222 is a deficient number, since it is larger than the sum of its proper divisors (7852593314).

15540445222 is a wasteful number, since it uses less digits than its factorization.

15540445222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27456902.

The product of its (nonzero) digits is 64000, while the sum is 34.

Adding to 15540445222 its reverse (22254404551), we get a palindrome (37794849773).

The spelling of 15540445222 in words is "fifteen billion, five hundred forty million, four hundred forty-five thousand, two hundred twenty-two".