2491538001 has 16 divisors (see below), whose sum is σ = 3536193600. Its totient is φ = 1555918848.

The previous prime is 2491537999. The next prime is 2491538011. The reversal of 2491538001 is 1008351942.

It is not a de Polignac number, because 2491538001 - 2¹ = 2491537999 is a prime.

It is a super-2 number, since 2×2491538001² = 12415523220854152002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2491538011) 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 15 ways as a sum of consecutive naturals, for example, 240496 + ... + 250641.

It is an arithmetic number, because the mean of its divisors is an integer number (221012100).

Almost surely, 2^2491538001 is an apocalyptic number.

It is an amenable number.

2491538001 is a deficient number, since it is larger than the sum of its proper divisors (1044655599).

2491538001 is a wasteful number, since it uses less digits than its factorization.

2491538001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491248.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 2491538001 is about 49915.3082831309. The cubic root of 2491538001 is about 1355.6757840571.

Adding to 2491538001 its reverse (1008351942), we get a palindrome (3499889943).

The spelling of 2491538001 in words is "two billion, four hundred ninety-one million, five hundred thirty-eight thousand, one".