2231323540 has 12 divisors (see below), whose sum is σ = 4685779476. Its totient is φ = 892529408.

The previous prime is 2231323529. The next prime is 2231323547. The reversal of 2231323540 is 453231322.

It can be written as a sum of positive squares in 2 ways, for example, as 1128153744 + 1103169796 = 33588^2 + 33214^2 .

It is a super-3 number, since 3×2231323540³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2231323547) 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 3 ways as a sum of consecutive naturals, for example, 55783069 + ... + 55783108.

It is an arithmetic number, because the mean of its divisors is an integer number (390481623).

Almost surely, 2^2231323540 is an apocalyptic number.

2231323540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2231323540 is an abundant number, since it is smaller than the sum of its proper divisors (2454455936).

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

2231323540 is a wasteful number, since it uses less digits than its factorization.

2231323540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111566186 (or 111566184 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 2231323540 is about 47236.8874927212. The cubic root of 2231323540 is about 1306.7349765008.

Adding to 2231323540 its reverse (453231322), we get a palindrome (2684554862).

The spelling of 2231323540 in words is "two billion, two hundred thirty-one million, three hundred twenty-three thousand, five hundred forty".