15572222020 has 24 divisors (see below), whose sum is σ = 34625294424. Its totient is φ = 5862483456.

The previous prime is 15572222009. The next prime is 15572222021. The reversal of 15572222020 is 2022227551.

It can be written as a sum of positive squares in 4 ways, for example, as 4550581764 + 11021640256 = 67458^2 + 104984^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 15572222020.

It is not an unprimeable number, because it can be changed into a prime (15572222021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22899987 + ... + 22900666.

It is an arithmetic number, because the mean of its divisors is an integer number (1442720601).

Almost surely, 2^15572222020 is an apocalyptic number.

15572222020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15572222020 is an abundant number, since it is smaller than the sum of its proper divisors (19053072404).

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

15572222020 is a wasteful number, since it uses less digits than its factorization.

15572222020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45800679 (or 45800677 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 28.

Adding to 15572222020 its reverse (2022227551), we get a palindrome (17594449571).

The spelling of 15572222020 in words is "fifteen billion, five hundred seventy-two million, two hundred twenty-two thousand, twenty".