131021645255 has 8 divisors (see below), whose sum is σ = 157242916224. Its totient is φ = 104806021600.

The previous prime is 131021645221. The next prime is 131021645257. The reversal of 131021645255 is 552546120131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131021645255 - 2²² = 131017450951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131021645257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1360616 + ... + 1453725.

It is an arithmetic number, because the mean of its divisors is an integer number (19655364528).

Almost surely, 2^131021645255 is an apocalyptic number.

131021645255 is a deficient number, since it is larger than the sum of its proper divisors (26221270969).

131021645255 is an equidigital number, since it uses as much as digits as its factorization.

131021645255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2823657.

The product of its (nonzero) digits is 36000, while the sum is 35.

Adding to 131021645255 its reverse (552546120131), we get a palindrome (683567765386).

The spelling of 131021645255 in words is "one hundred thirty-one billion, twenty-one million, six hundred forty-five thousand, two hundred fifty-five".