2188455 has 8 divisors (see below), whose sum is σ = 3501552. Its totient is φ = 1167168.

The previous prime is 2188451. The next prime is 2188463. The reversal of 2188455 is 5548812.

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

It is not a de Polignac number, because 2188455 - 2² = 2188451 is a prime.

2188455 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2188451) 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, 72934 + ... + 72963.

It is an arithmetic number, because the mean of its divisors is an integer number (437694).

2^2188455 is an apocalyptic number.

2188455 is a deficient number, since it is larger than the sum of its proper divisors (1313097).

2188455 is a wasteful number, since it uses less digits than its factorization.

2188455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145905.

The product of its digits is 12800, while the sum is 33.

The square root of 2188455 is about 1479.3427594712. The cubic root of 2188455 is about 129.8312405860.

The spelling of 2188455 in words is "two million, one hundred eighty-eight thousand, four hundred fifty-five".