2156263041631 has 4 divisors (see below), whose sum is σ = 2156620696200. Its totient is φ = 2155905387064.

The previous prime is 2156263041613. The next prime is 2156263041661. The reversal of 2156263041631 is 1361403626512.

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

It is a cyclic number.

It is not a de Polignac number, because 2156263041631 - 2¹⁷ = 2156262910559 is a prime.

It is a super-2 number, since 2×2156263041631² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156263041661) 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, 178818241 + ... + 178830298.

It is an arithmetic number, because the mean of its divisors is an integer number (539155174050).

Almost surely, 2^{2156263041631} is an apocalyptic number.

2156263041631 is a deficient number, since it is larger than the sum of its proper divisors (357654569).

2156263041631 is an equidigital number, since it uses as much as digits as its factorization.

2156263041631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357654568.

The product of its (nonzero) digits is 155520, while the sum is 40.

The spelling of 2156263041631 in words is "two trillion, one hundred fifty-six billion, two hundred sixty-three million, forty-one thousand, six hundred thirty-one".