15255042021220 has 12 divisors (see below), whose sum is σ = 32035588244604. Its totient is φ = 6102016808480.

The previous prime is 15255042021161. The next prime is 15255042021293. The reversal of 15255042021220 is 2212024055251.

It can be written as a sum of positive squares in 2 ways, for example, as 6676270487104 + 8578771534116 = 2583848^2 + 2928954^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 381376050511 + ... + 381376050550.

It is an arithmetic number, because the mean of its divisors is an integer number (2669632353717).

Almost surely, 2^{15255042021220} is an apocalyptic number.

15255042021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15255042021220 is an abundant number, since it is smaller than the sum of its proper divisors (16780546223384).

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

15255042021220 is a wasteful number, since it uses less digits than its factorization.

15255042021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762752101070 (or 762752101068 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 31.

Adding to 15255042021220 its reverse (2212024055251), we get a palindrome (17467066076471).

The spelling of 15255042021220 in words is "fifteen trillion, two hundred fifty-five billion, forty-two million, twenty-one thousand, two hundred twenty".