2311201256 has 64 divisors (see below), whose sum is σ = 5343273600. Its totient is φ = 912653568.

The previous prime is 2311201237. The next prime is 2311201259. The reversal of 2311201256 is 6521021132.

It is not an unprimeable number, because it can be changed into a prime (2311201259) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 443675 + ... + 448853.

It is an arithmetic number, because the mean of its divisors is an integer number (83488650).

Almost surely, 2^2311201256 is an apocalyptic number.

2311201256 is a gapful number since it is divisible by the number (26) 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 2311201256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2671636800).

2311201256 is an abundant number, since it is smaller than the sum of its proper divisors (3032072344).

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

2311201256 is a wasteful number, since it uses less digits than its factorization.

2311201256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5818 (or 5814 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 2311201256 is about 48074.9545605609. The cubic root of 2311201256 is about 1322.1455114354.

Adding to 2311201256 its reverse (6521021132), we get a palindrome (8832222388).

The spelling of 2311201256 in words is "two billion, three hundred eleven million, two hundred one thousand, two hundred fifty-six".