2131710655 has 4 divisors (see below), whose sum is σ = 2558052792. Its totient is φ = 1705368520.

The previous prime is 2131710653. The next prime is 2131710673. The reversal of 2131710655 is 5560171312.

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

It is not a de Polignac number, because 2131710655 - 2¹ = 2131710653 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 not an unprimeable number, because it can be changed into a prime (2131710653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213171061 + ... + 213171070.

It is an arithmetic number, because the mean of its divisors is an integer number (639513198).

Almost surely, 2^2131710655 is an apocalyptic number.

2131710655 is a deficient number, since it is larger than the sum of its proper divisors (426342137).

2131710655 is an equidigital number, since it uses as much as digits as its factorization.

2131710655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426342136.

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 2131710655 is about 46170.4521853534. The cubic root of 2131710655 is about 1286.9927052878.

Adding to 2131710655 its reverse (5560171312), we get a palindrome (7691881967).

The spelling of 2131710655 in words is "two billion, one hundred thirty-one million, seven hundred ten thousand, six hundred fifty-five".