2156520053171 has 8 divisors (see below), whose sum is σ = 2396955394224. Its totient is φ = 1923482722720.

The previous prime is 2156520053159. The next prime is 2156520053183. The reversal of 2156520053171 is 1713500256512.

It is an interprime number because it is at equal distance from previous prime (2156520053159) and next prime (2156520053183).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2156520053171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2156520053111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1849502036 + ... + 1849503201.

It is an arithmetic number, because the mean of its divisors is an integer number (299619424278).

Almost surely, 2^{2156520053171} is an apocalyptic number.

2156520053171 is a deficient number, since it is larger than the sum of its proper divisors (240435341053).

2156520053171 is a wasteful number, since it uses less digits than its factorization.

2156520053171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3699005301.

The product of its (nonzero) digits is 63000, while the sum is 38.

The spelling of 2156520053171 in words is "two trillion, one hundred fifty-six billion, five hundred twenty million, fifty-three thousand, one hundred seventy-one".