2172243587 has 2 divisors, whose sum is σ = 2172243588. Its totient is φ = 2172243586.

The previous prime is 2172243583. The next prime is 2172243677. The reversal of 2172243587 is 7853422712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2172243587 - 2² = 2172243583 is a prime.

It is not a weakly prime, because it can be changed into another prime (2172243583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1086121793 + 1086121794.

It is an arithmetic number, because the mean of its divisors is an integer number (1086121794).

Almost surely, 2^2172243587 is an apocalyptic number.

2172243587 is a deficient number, since it is larger than the sum of its proper divisors (1).

2172243587 is an equidigital number, since it uses as much as digits as its factorization.

2172243587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 188160, while the sum is 41.

The square root of 2172243587 is about 46607.3340473364. The cubic root of 2172243587 is about 1295.0986219073.

The spelling of 2172243587 in words is "two billion, one hundred seventy-two million, two hundred forty-three thousand, five hundred eighty-seven".