3111243240 has 256 divisors, whose sum is σ = 10964160000. Its totient is φ = 705976320.

The previous prime is 3111243229. The next prime is 3111243241. The reversal of 3111243240 is 423421113.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (3111243241) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11071900 + ... + 11072180.

It is an arithmetic number, because the mean of its divisors is an integer number (42828750).

Almost surely, 2^3111243240 is an apocalyptic number.

3111243240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3111243240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5482080000).

3111243240 is an abundant number, since it is smaller than the sum of its proper divisors (7852916760).

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

3111243240 is a wasteful number, since it uses less digits than its factorization.

3111243240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585 (or 567 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 3111243240 is about 55778.5195214072. The cubic root of 3111243240 is about 1459.8603794676.

Adding to 3111243240 its reverse (423421113), we get a palindrome (3534664353).

The spelling of 3111243240 in words is "three billion, one hundred eleven million, two hundred forty-three thousand, two hundred forty".