191628213 has 16 divisors (see below), whose sum is σ = 294687360. Its totient is φ = 108495936.

The previous prime is 191628191. The next prime is 191628221. The reversal of 191628213 is 312826191.

191628213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 191628213 - 2⁵ = 191628181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191628263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39570 + ... + 44147.

It is an arithmetic number, because the mean of its divisors is an integer number (18417960).

Almost surely, 2^191628213 is an apocalyptic number.

It is an amenable number.

191628213 is a deficient number, since it is larger than the sum of its proper divisors (103059147).

191628213 is a wasteful number, since it uses less digits than its factorization.

191628213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83836.

The product of its digits is 5184, while the sum is 33.

The square root of 191628213 is about 13842.9842519595. The cubic root of 191628213 is about 576.5272197080.

The spelling of 191628213 in words is "one hundred ninety-one million, six hundred twenty-eight thousand, two hundred thirteen".