2188394925 has 12 divisors (see below), whose sum is σ = 3618146400. Its totient is φ = 1167143920.

The previous prime is 2188394909. The next prime is 2188394941. The reversal of 2188394925 is 5294938812.

It is an interprime number because it is at equal distance from previous prime (2188394909) and next prime (2188394941).

It is not a de Polignac number, because 2188394925 - 2⁴ = 2188394909 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14589225 + ... + 14589374.

It is an arithmetic number, because the mean of its divisors is an integer number (301512200).

Almost surely, 2^2188394925 is an apocalyptic number.

2188394925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2188394925 is a deficient number, since it is larger than the sum of its proper divisors (1429751475).

2188394925 is a wasteful number, since it uses less digits than its factorization.

2188394925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29178612 (or 29178607 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 51.

The square root of 2188394925 is about 46780.2835070503. The cubic root of 2188394925 is about 1298.3005258145.

The spelling of 2188394925 in words is "two billion, one hundred eighty-eight million, three hundred ninety-four thousand, nine hundred twenty-five".