2231145231 has 16 divisors (see below), whose sum is σ = 3400551168. Its totient is φ = 1274673600.

The previous prime is 2231145227. The next prime is 2231145277. The reversal of 2231145231 is 1325411322.

2231145231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2231145231 - 2² = 2231145227 is a prime.

It is a super-3 number, since 3×2231145231³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2231145431) 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, 138771 + ... + 154011.

It is an arithmetic number, because the mean of its divisors is an integer number (212534448).

Almost surely, 2^2231145231 is an apocalyptic number.

2231145231 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2231145231 is a deficient number, since it is larger than the sum of its proper divisors (1169405937).

2231145231 is a wasteful number, since it uses less digits than its factorization.

2231145231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22222.

The product of its digits is 1440, while the sum is 24.

The square root of 2231145231 is about 47235.0000635122. Note that the first 4 decimals coincide. The cubic root of 2231145231 is about 1306.7001677413.

Adding to 2231145231 its reverse (1325411322), we get a palindrome (3556556553).

The spelling of 2231145231 in words is "two billion, two hundred thirty-one million, one hundred forty-five thousand, two hundred thirty-one".