2171342774 has 4 divisors (see below), whose sum is σ = 3257014164. Its totient is φ = 1085671386.

The previous prime is 2171342753. The next prime is 2171342779. The reversal of 2171342774 is 4772431712.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2171342779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 542835692 + ... + 542835695.

It is an arithmetic number, because the mean of its divisors is an integer number (814253541).

Almost surely, 2^2171342774 is an apocalyptic number.

2171342774 is a deficient number, since it is larger than the sum of its proper divisors (1085671390).

2171342774 is a wasteful number, since it uses less digits than its factorization.

2171342774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1085671389.

The product of its digits is 65856, while the sum is 38.

The square root of 2171342774 is about 46597.6691906366. The cubic root of 2171342774 is about 1294.9195746180.

The spelling of 2171342774 in words is "two billion, one hundred seventy-one million, three hundred forty-two thousand, seven hundred seventy-four".