2491523191 has 8 divisors (see below), whose sum is σ = 2512185984. Its totient is φ = 2470885560.

The previous prime is 2491523159. The next prime is 2491523201. The reversal of 2491523191 is 1913251942.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2491523191 - 2⁵ = 2491523159 is a prime.

It is a super-2 number, since 2×2491523191² = 12415375622581644962, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2491523191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2491523491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 228240 + ... + 238906.

It is an arithmetic number, because the mean of its divisors is an integer number (314023248).

Almost surely, 2^2491523191 is an apocalyptic number.

2491523191 is a deficient number, since it is larger than the sum of its proper divisors (20662793).

2491523191 is a wasteful number, since it uses less digits than its factorization.

2491523191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12581.

The product of its digits is 19440, while the sum is 37.

The square root of 2491523191 is about 49915.1599316280. The cubic root of 2491523191 is about 1355.6730979521.

The spelling of 2491523191 in words is "two billion, four hundred ninety-one million, five hundred twenty-three thousand, one hundred ninety-one".