2171205354 has 64 divisors (see below), whose sum is σ = 4852224000. Its totient is φ = 643661568.

The previous prime is 2171205343. The next prime is 2171205409. The reversal of 2171205354 is 4535021712.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 903847 + ... + 906245.

It is an arithmetic number, because the mean of its divisors is an integer number (75816000).

Almost surely, 2^2171205354 is an apocalyptic number.

2171205354 is an abundant number, since it is smaller than the sum of its proper divisors (2681018646).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2171205354 is a wasteful number, since it uses less digits than its factorization.

2171205354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2907.

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 2171205354 is about 46596.1946300339. The cubic root of 2171205354 is about 1294.8922564067.

The spelling of 2171205354 in words is "two billion, one hundred seventy-one million, two hundred five thousand, three hundred fifty-four".