20131552255 has 4 divisors (see below), whose sum is σ = 24157862712. Its totient is φ = 16105241800.

The previous prime is 20131552249. The next prime is 20131552271. The reversal of 20131552255 is 55225513102.

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

It is not a de Polignac number, because 20131552255 - 2⁵ = 20131552223 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

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, 2013155221 + ... + 2013155230.

It is an arithmetic number, because the mean of its divisors is an integer number (6039465678).

Almost surely, 2^20131552255 is an apocalyptic number.

20131552255 is a deficient number, since it is larger than the sum of its proper divisors (4026310457).

20131552255 is an equidigital number, since it uses as much as digits as its factorization.

20131552255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4026310456.

The product of its (nonzero) digits is 15000, while the sum is 31.

The spelling of 20131552255 in words is "twenty billion, one hundred thirty-one million, five hundred fifty-two thousand, two hundred fifty-five".