15222051020 has 96 divisors (see below), whose sum is σ = 37310112000. Its totient is φ = 5157907200.

The previous prime is 15222051007. The next prime is 15222051029. The reversal of 15222051020 is 2015022251.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 15222050983 and 15222051001.

It is not an unprimeable number, because it can be changed into a prime (15222051029) 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, 225131 + ... + 284829.

It is an arithmetic number, because the mean of its divisors is an integer number (388647000).

Almost surely, 2^15222051020 is an apocalyptic number.

15222051020 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 15222051020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18655056000).

15222051020 is an abundant number, since it is smaller than the sum of its proper divisors (22088060980).

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

15222051020 is a wasteful number, since it uses less digits than its factorization.

15222051020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59799 (or 59797 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

Adding to 15222051020 its reverse (2015022251), we get a palindrome (17237073271).

The spelling of 15222051020 in words is "fifteen billion, two hundred twenty-two million, fifty-one thousand, twenty".