191231248 has 20 divisors (see below), whose sum is σ = 399011788. Its totient is φ = 88260480.

The previous prime is 191231237. The next prime is 191231267. The reversal of 191231248 is 842132191.

191231248 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 46076944 + 145154304 = 6788^2 + 12048^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 459483 + ... + 459898.

Almost surely, 2^191231248 is an apocalyptic number.

It is an amenable number.

191231248 is an abundant number, since it is smaller than the sum of its proper divisors (207780540).

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

191231248 is a wasteful number, since it uses less digits than its factorization.

191231248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919402 (or 919396 counting only the distinct ones).

The product of its digits is 3456, while the sum is 31.

The square root of 191231248 is about 13828.6386893288. The cubic root of 191231248 is about 576.1288452763.

The spelling of 191231248 in words is "one hundred ninety-one million, two hundred thirty-one thousand, two hundred forty-eight".