15222440000 has 140 divisors (see below), whose sum is σ = 37916412864. Its totient is φ = 6061632000.

The previous prime is 15222439979. The next prime is 15222440003. The reversal of 15222440000 is 4422251.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (15222440003) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10519277 + ... + 10520723.

Almost surely, 2^15222440000 is an apocalyptic number.

15222440000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15222440000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18958206432).

15222440000 is an abundant number, since it is smaller than the sum of its proper divisors (22693972864).

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

15222440000 is an equidigital number, since it uses as much as digits as its factorization.

15222440000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1742 (or 1717 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

Adding to 15222440000 its reverse (4422251), we get a palindrome (15226862251).

The spelling of 15222440000 in words is "fifteen billion, two hundred twenty-two million, four hundred forty thousand".