2187942455 has 4 divisors (see below), whose sum is σ = 2625530952. Its totient is φ = 1750353960.

The previous prime is 2187942403. The next prime is 2187942457. The reversal of 2187942455 is 5542497812.

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

It is not a de Polignac number, because 2187942455 - 2⁶ = 2187942391 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 (2187942457) 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, 218794241 + ... + 218794250.

It is an arithmetic number, because the mean of its divisors is an integer number (656382738).

Almost surely, 2^2187942455 is an apocalyptic number.

2187942455 is a deficient number, since it is larger than the sum of its proper divisors (437588497).

2187942455 is an equidigital number, since it uses as much as digits as its factorization.

2187942455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437588496.

The product of its digits is 806400, while the sum is 47.

The square root of 2187942455 is about 46775.4471384294. The cubic root of 2187942455 is about 1298.2110412760.

The spelling of 2187942455 in words is "two billion, one hundred eighty-seven million, nine hundred forty-two thousand, four hundred fifty-five".