215054265722755 has 4 divisors (see below), whose sum is σ = 258065118867312. Its totient is φ = 172043412578200.

The previous prime is 215054265722719. The next prime is 215054265722861. The reversal of 215054265722755 is 557227562450512.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 215054265722755 - 2¹⁹ = 215054265198467 is a prime.

It is a super-3 number, since 3×215054265722755³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 215054265722755.

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, 21505426572271 + ... + 21505426572280.

It is an arithmetic number, because the mean of its divisors is an integer number (64516279716828).

Almost surely, 2^{215054265722755} is an apocalyptic number.

215054265722755 is a deficient number, since it is larger than the sum of its proper divisors (43010853144557).

215054265722755 is an equidigital number, since it uses as much as digits as its factorization.

215054265722755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43010853144556.

The product of its (nonzero) digits is 58800000, while the sum is 58.

The spelling of 215054265722755 in words is "two hundred fifteen trillion, fifty-four billion, two hundred sixty-five million, seven hundred twenty-two thousand, seven hundred fifty-five".