15220445240 has 128 divisors (see below), whose sum is σ = 45980766720. Its totient is φ = 4379097600.

The previous prime is 15220445209. The next prime is 15220445243. The reversal of 15220445240 is 4254402251.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15220445243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 150026 + ... + 230105.

It is an arithmetic number, because the mean of its divisors is an integer number (359224740).

Almost surely, 2^15220445240 is an apocalyptic number.

15220445240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15220445240 is an abundant number, since it is smaller than the sum of its proper divisors (30760321480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15220445240 is a wasteful number, since it uses less digits than its factorization.

15220445240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380173 (or 380169 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 29.

Adding to 15220445240 its reverse (4254402251), we get a palindrome (19474847491).

The spelling of 15220445240 in words is "fifteen billion, two hundred twenty million, four hundred forty-five thousand, two hundred forty".