1550000053220 has 12 divisors (see below), whose sum is σ = 3255000111804. Its totient is φ = 620000021280.

The previous prime is 1550000053207. The next prime is 1550000053253. The reversal of 1550000053220 is 223500000551.

It can be written as a sum of positive squares in 2 ways, for example, as 764589350464 + 785410702756 = 874408^2 + 886234^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38750001311 + ... + 38750001350.

It is an arithmetic number, because the mean of its divisors is an integer number (271250009317).

Almost surely, 2^{1550000053220} is an apocalyptic number.

1550000053220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1550000053220 is an abundant number, since it is smaller than the sum of its proper divisors (1705000058584).

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

1550000053220 is a wasteful number, since it uses less digits than its factorization.

1550000053220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77500002670 (or 77500002668 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 23.

Adding to 1550000053220 its reverse (223500000551), we get a palindrome (1773500053771).

The spelling of 1550000053220 in words is "one trillion, five hundred fifty billion, fifty-three thousand, two hundred twenty".