2231531441 has 2 divisors, whose sum is σ = 2231531442. Its totient is φ = 2231531440.

The previous prime is 2231531371. The next prime is 2231531447. The reversal of 2231531441 is 1441351322.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1622478400 + 609053041 = 40280^2 + 24679^2 .

It is a cyclic number.

It is not a de Polignac number, because 2231531441 - 2¹⁰ = 2231530417 is a prime.

It is a super-3 number, since 3×2231531441³ (a number of 29 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2231531441.

It is not a weakly prime, because it can be changed into another prime (2231531447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1115765720 + 1115765721.

It is an arithmetic number, because the mean of its divisors is an integer number (1115765721).

Almost surely, 2^2231531441 is an apocalyptic number.

It is an amenable number.

2231531441 is a deficient number, since it is larger than the sum of its proper divisors (1).

2231531441 is an equidigital number, since it uses as much as digits as its factorization.

2231531441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 26.

The square root of 2231531441 is about 47239.0880627474. The cubic root of 2231531441 is about 1306.7755597490.

Adding to 2231531441 its reverse (1441351322), we get a palindrome (3672882763).

The spelling of 2231531441 in words is "two billion, two hundred thirty-one million, five hundred thirty-one thousand, four hundred forty-one".