2171279902 has 24 divisors (see below), whose sum is σ = 3735578448. Its totient is φ = 944032320.

The previous prime is 2171279881. The next prime is 2171279947. The reversal of 2171279902 is 2099721712.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 189483 + ... + 200614.

It is an arithmetic number, because the mean of its divisors is an integer number (155649102).

Almost surely, 2^2171279902 is an apocalyptic number.

2171279902 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2171279902 is a deficient number, since it is larger than the sum of its proper divisors (1564298546).

2171279902 is a wasteful number, since it uses less digits than its factorization.

2171279902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390144 (or 390133 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 40.

The square root of 2171279902 is about 46596.9945597353. The cubic root of 2171279902 is about 1294.9070762122.

The spelling of 2171279902 in words is "two billion, one hundred seventy-one million, two hundred seventy-nine thousand, nine hundred two".