189216057 has 8 divisors (see below), whose sum is σ = 254889376. Its totient is φ = 124843392.

The previous prime is 189216037. The next prime is 189216151. The reversal of 189216057 is 750612981.

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

It is a de Polignac number, because none of the positive numbers 2^k-189216057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189216037) 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, 324823 + ... + 325404.

It is an arithmetic number, because the mean of its divisors is an integer number (31861172).

Almost surely, 2^189216057 is an apocalyptic number.

It is an amenable number.

189216057 is a deficient number, since it is larger than the sum of its proper divisors (65673319).

189216057 is an equidigital number, since it uses as much as digits as its factorization.

189216057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650327.

The product of its (nonzero) digits is 30240, while the sum is 39.

The square root of 189216057 is about 13755.5827575570. The cubic root of 189216057 is about 574.0979499547.

The spelling of 189216057 in words is "one hundred eighty-nine million, two hundred sixteen thousand, fifty-seven".