189451211 has 8 divisors (see below), whose sum is σ = 195452544. Its totient is φ = 183496320.

The previous prime is 189451187. The next prime is 189451231. The reversal of 189451211 is 112154981.

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-189451211 is a prime.

It is a super-2 number, since 2×189451211² = 71783522698733042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189451231) 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, 3230 + ... + 19731.

It is an arithmetic number, because the mean of its divisors is an integer number (24431568).

Almost surely, 2^189451211 is an apocalyptic number.

189451211 is a deficient number, since it is larger than the sum of its proper divisors (6001333).

189451211 is a wasteful number, since it uses less digits than its factorization.

189451211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23221.

The product of its digits is 2880, while the sum is 32.

The square root of 189451211 is about 13764.1276875798. The cubic root of 189451211 is about 574.3356773871.

The spelling of 189451211 in words is "one hundred eighty-nine million, four hundred fifty-one thousand, two hundred eleven".