20150220322155 has 32 divisors (see below), whose sum is σ = 40195764177408. Its totient is φ = 8374117536000.

The previous prime is 20150220322153. The next prime is 20150220322187. The reversal of 20150220322155 is 55122302205102.

It is not a de Polignac number, because 20150220322155 - 2¹ = 20150220322153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20150220322153) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8723037946 + ... + 8723040255.

It is an arithmetic number, because the mean of its divisors is an integer number (1256117630544).

Almost surely, 2^{20150220322155} is an apocalyptic number.

20150220322155 is a deficient number, since it is larger than the sum of its proper divisors (20045543855253).

20150220322155 is a wasteful number, since it uses less digits than its factorization.

20150220322155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17446078227.

The product of its (nonzero) digits is 12000, while the sum is 30.

Adding to 20150220322155 its reverse (55122302205102), we get a palindrome (75272522527257).

The spelling of 20150220322155 in words is "twenty trillion, one hundred fifty billion, two hundred twenty million, three hundred twenty-two thousand, one hundred fifty-five".