2102242591 has 4 divisors (see below), whose sum is σ = 2102458072. Its totient is φ = 2102027112.

The previous prime is 2102242553. The next prime is 2102242601. The reversal of 2102242591 is 1952422012.

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

It is a cyclic number.

It is not a de Polignac number, because 2102242591 - 2²⁵ = 2068688159 is a prime.

It is a super-2 number, since 2×2102242591² = 8838847822828786562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102242531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92376 + ... + 112861.

It is an arithmetic number, because the mean of its divisors is an integer number (525614518).

Almost surely, 2^2102242591 is an apocalyptic number.

2102242591 is a deficient number, since it is larger than the sum of its proper divisors (215481).

2102242591 is a wasteful number, since it uses less digits than its factorization.

2102242591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215480.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 2102242591 is about 45850.2190943511. The cubic root of 2102242591 is about 1281.0348465185.

The spelling of 2102242591 in words is "two billion, one hundred two million, two hundred forty-two thousand, five hundred ninety-one".