2102002391 has 8 divisors (see below), whose sum is σ = 2154037200. Its totient is φ = 2050004160.

The previous prime is 2102002373. The next prime is 2102002403. The reversal of 2102002391 is 1932002012.

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

It is a cyclic number.

It is not a de Polignac number, because 2102002391 - 2¹⁰ = 2102001367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102002891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134840 + ... + 149618.

It is an arithmetic number, because the mean of its divisors is an integer number (269254650).

Almost surely, 2^2102002391 is an apocalyptic number.

2102002391 is a deficient number, since it is larger than the sum of its proper divisors (52034809).

2102002391 is a wasteful number, since it uses less digits than its factorization.

2102002391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18289.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 2102002391 is about 45847.5996209180. The cubic root of 2102002391 is about 1280.9860547676.

The spelling of 2102002391 in words is "two billion, one hundred two million, two thousand, three hundred ninety-one".