23005520221155 has 64 divisors (see below), whose sum is σ = 39447502848000. Its totient is φ = 11413879247232.

The previous prime is 23005520221139. The next prime is 23005520221157. The reversal of 23005520221155 is 55112202550032.

It is not a de Polignac number, because 23005520221155 - 2⁴ = 23005520221139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23005520221157) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14072926 + ... + 15622364.

It is an arithmetic number, because the mean of its divisors is an integer number (616367232000).

Almost surely, 2^{23005520221155} is an apocalyptic number.

23005520221155 is a deficient number, since it is larger than the sum of its proper divisors (16441982626845).

23005520221155 is a wasteful number, since it uses less digits than its factorization.

23005520221155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1550408.

The product of its (nonzero) digits is 30000, while the sum is 33.

Adding to 23005520221155 its reverse (55112202550032), we get a palindrome (78117722771187).

It can be divided in two parts, 230055 and 20221155, that added together give a triangular number (20451210 = T₆₃₉₅).

The spelling of 23005520221155 in words is "twenty-three trillion, five billion, five hundred twenty million, two hundred twenty-one thousand, one hundred fifty-five".