191125220 has 96 divisors (see below), whose sum is σ = 499395456. Its totient is φ = 60364800.

The previous prime is 191125183. The next prime is 191125223. The reversal of 191125220 is 22521191.

191125220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (191125223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46655 + ... + 50585.

It is an arithmetic number, because the mean of its divisors is an integer number (5202036).

Almost surely, 2^191125220 is an apocalyptic number.

191125220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 191125220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249697728).

191125220 is an abundant number, since it is smaller than the sum of its proper divisors (308270236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

191125220 is a wasteful number, since it uses less digits than its factorization.

191125220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3981 (or 3979 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 191125220 is about 13824.8045194136. The cubic root of 191125220 is about 576.0223475447.

The spelling of 191125220 in words is "one hundred ninety-one million, one hundred twenty-five thousand, two hundred twenty".