21255230550115 has 8 divisors (see below), whose sum is σ = 25506396840528. Its totient is φ = 17004104319840.

The previous prime is 21255230550101. The next prime is 21255230550131. The reversal of 21255230550115 is 51105503255212.

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

It is not a de Polignac number, because 21255230550115 - 2¹¹ = 21255230548067 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8835112 + ... + 10980421.

It is an arithmetic number, because the mean of its divisors is an integer number (3188299605066).

Almost surely, 2^{21255230550115} is an apocalyptic number.

21255230550115 is a deficient number, since it is larger than the sum of its proper divisors (4251166290413).

21255230550115 is a wasteful number, since it uses less digits than its factorization.

21255230550115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20030069.

The product of its (nonzero) digits is 75000, while the sum is 37.

The spelling of 21255230550115 in words is "twenty-one trillion, two hundred fifty-five billion, two hundred thirty million, five hundred fifty thousand, one hundred fifteen".