189216425 has 12 divisors (see below), whose sum is σ = 235944720. Its totient is φ = 150523920.

The previous prime is 189216397. The next prime is 189216437. The reversal of 189216425 is 524612981.

It is not a de Polignac number, because 189216425 - 2¹⁴ = 189200041 is a prime.

It is a Curzon 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, 16667 + ... + 25616.

It is an arithmetic number, because the mean of its divisors is an integer number (19662060).

Almost surely, 2^189216425 is an apocalyptic number.

It is an amenable number.

189216425 is a deficient number, since it is larger than the sum of its proper divisors (46728295).

189216425 is a wasteful number, since it uses less digits than its factorization.

189216425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42472 (or 42467 counting only the distinct ones).

The product of its digits is 34560, while the sum is 38.

The square root of 189216425 is about 13755.5961339376. The cubic root of 189216425 is about 574.0983221358.

The spelling of 189216425 in words is "one hundred eighty-nine million, two hundred sixteen thousand, four hundred twenty-five".