15255042021215 has 8 divisors (see below), whose sum is σ = 19269526763760. Its totient is φ = 11561716058112.

The previous prime is 15255042021161. The next prime is 15255042021293. The reversal of 15255042021215 is 51212024055251.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15255042021215 - 2²⁶ = 15254974912351 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80289694754 + ... + 80289694943.

It is an arithmetic number, because the mean of its divisors is an integer number (2408690845470).

Almost surely, 2^{15255042021215} is an apocalyptic number.

15255042021215 is a deficient number, since it is larger than the sum of its proper divisors (4014484742545).

15255042021215 is a wasteful number, since it uses less digits than its factorization.

15255042021215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160579389721.

The product of its (nonzero) digits is 40000, while the sum is 35.

Adding to 15255042021215 its reverse (51212024055251), we get a palindrome (66467066076466).

The spelling of 15255042021215 in words is "fifteen trillion, two hundred fifty-five billion, forty-two million, twenty-one thousand, two hundred fifteen".