2156271455 has 16 divisors (see below), whose sum is σ = 2789129280. Its totient is φ = 1590859008.

The previous prime is 2156271443. The next prime is 2156271457. The reversal of 2156271455 is 5541726512.

It is a cyclic number.

It is not a de Polignac number, because 2156271455 - 2⁸ = 2156271199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156271457) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58694 + ... + 88076.

It is an arithmetic number, because the mean of its divisors is an integer number (174320580).

Almost surely, 2^2156271455 is an apocalyptic number.

2156271455 is a deficient number, since it is larger than the sum of its proper divisors (632857825).

2156271455 is a wasteful number, since it uses less digits than its factorization.

2156271455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30530.

The product of its digits is 84000, while the sum is 38.

The square root of 2156271455 is about 46435.6700716163. The cubic root of 2156271455 is about 1291.9165979816.

Adding to 2156271455 its reverse (5541726512), we get a palindrome (7697997967).

The spelling of 2156271455 in words is "two billion, one hundred fifty-six million, two hundred seventy-one thousand, four hundred fifty-five".