2156342030317 has 4 divisors (see below), whose sum is σ = 2156345271040. Its totient is φ = 2156338789596.

The previous prime is 2156342030309. The next prime is 2156342030377. The reversal of 2156342030317 is 7130302436512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2156342030317 - 2³ = 2156342030309 is a prime.

It is a super-3 number, since 3×2156342030317³ (a number of 38 digits) contains 333 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 (2156342030377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217323 + ... + 2088040.

It is an arithmetic number, because the mean of its divisors is an integer number (539086317760).

Almost surely, 2^{2156342030317} is an apocalyptic number.

It is an amenable number.

2156342030317 is a deficient number, since it is larger than the sum of its proper divisors (3240723).

2156342030317 is an equidigital number, since it uses as much as digits as its factorization.

2156342030317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3240722.

The product of its (nonzero) digits is 90720, while the sum is 37.

Adding to 2156342030317 its reverse (7130302436512), we get a palindrome (9286644466829).

The spelling of 2156342030317 in words is "two trillion, one hundred fifty-six billion, three hundred forty-two million, thirty thousand, three hundred seventeen".