20150220255 has 128 divisors (see below), whose sum is σ = 37265080320. Its totient is φ = 9207744000.

The previous prime is 20150220221. The next prime is 20150220269. The reversal of 20150220255 is 55202205102.

It is not a de Polignac number, because 20150220255 - 2⁷ = 20150220127 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 64791550 + ... + 64791860.

It is an arithmetic number, because the mean of its divisors is an integer number (291133440).

Almost surely, 2^20150220255 is an apocalyptic number.

20150220255 is a deficient number, since it is larger than the sum of its proper divisors (17114860065).

20150220255 is a wasteful number, since it uses less digits than its factorization.

20150220255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653.

The product of its (nonzero) digits is 2000, while the sum is 24.

Adding to 20150220255 its reverse (55202205102), we get a palindrome (75352425357).

The spelling of 20150220255 in words is "twenty billion, one hundred fifty million, two hundred twenty thousand, two hundred fifty-five".