2151172863 has 128 divisors (see below), whose sum is σ = 3932160000. Its totient is φ = 1160218080.

The previous prime is 2151172861. The next prime is 2151172867. The reversal of 2151172863 is 3682711512.

It is not a de Polignac number, because 2151172863 - 2¹ = 2151172861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151172861) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 16938306 + ... + 16938432.

It is an arithmetic number, because the mean of its divisors is an integer number (30720000).

Almost surely, 2^2151172863 is an apocalyptic number.

2151172863 is a deficient number, since it is larger than the sum of its proper divisors (1780987137).

2151172863 is a wasteful number, since it uses less digits than its factorization.

2151172863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247 (or 227 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 2151172863 is about 46380.7380601042. The cubic root of 2151172863 is about 1290.8975311483.

The spelling of 2151172863 in words is "two billion, one hundred fifty-one million, one hundred seventy-two thousand, eight hundred sixty-three".