2001243510 has 112 divisors (see below), whose sum is σ = 6172599456. Its totient is φ = 457415424.

The previous prime is 2001243509. The next prime is 2001243511. The reversal of 2001243510 is 153421002.

It is an interprime number because it is at equal distance from previous prime (2001243509) and next prime (2001243511).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001243511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 31422 + ... + 70638.

Almost surely, 2^2001243510 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2001243510, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3086299728).

2001243510 is an abundant number, since it is smaller than the sum of its proper divisors (4171355946).

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

2001243510 is an equidigital number, since it uses as much as digits as its factorization.

2001243510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39249 (or 39234 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 2001243510 is about 44735.2602540770. The cubic root of 2001243510 is about 1260.1821165333.

Adding to 2001243510 its reverse (153421002), we get a palindrome (2154664512).

The spelling of 2001243510 in words is "two billion, one million, two hundred forty-three thousand, five hundred ten".