191145312 has 48 divisors (see below), whose sum is σ = 557509680. Its totient is φ = 63714816.

The previous prime is 191145259. The next prime is 191145347. The reversal of 191145312 is 213541191.

It is a happy number.

191145312 is a `hidden beast` number, since 19 + 114 + 531 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109753 + ... + 111480.

It is an arithmetic number, because the mean of its divisors is an integer number (11614785).

Almost surely, 2^191145312 is an apocalyptic number.

191145312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

191145312 is an abundant number, since it is smaller than the sum of its proper divisors (366364368).

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

191145312 is a wasteful number, since it uses less digits than its factorization.

191145312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221252 (or 221238 counting only the distinct ones).

The product of its digits is 1080, while the sum is 27.

The square root of 191145312 is about 13825.5311652030. The cubic root of 191145312 is about 576.0425315816.

The spelling of 191145312 in words is "one hundred ninety-one million, one hundred forty-five thousand, three hundred twelve".