2171671438 has 8 divisors (see below), whose sum is σ = 3369835080. Its totient is φ = 1048393080.

The previous prime is 2171671433. The next prime is 2171671457. The reversal of 2171671438 is 8341761712.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2171671438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2171671433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18721248 + ... + 18721363.

It is an arithmetic number, because the mean of its divisors is an integer number (421229385).

Almost surely, 2^2171671438 is an apocalyptic number.

2171671438 is a deficient number, since it is larger than the sum of its proper divisors (1198163642).

2171671438 is a wasteful number, since it uses less digits than its factorization.

2171671438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37442642.

The product of its digits is 56448, while the sum is 40.

The square root of 2171671438 is about 46601.1956713559. The cubic root of 2171671438 is about 1294.9849062308.

The spelling of 2171671438 in words is "two billion, one hundred seventy-one million, six hundred seventy-one thousand, four hundred thirty-eight".