331232261 has 2 divisors, whose sum is σ = 331232262. Its totient is φ = 331232260.

The previous prime is 331232249. The next prime is 331232273. The reversal of 331232261 is 162232133.

It is a balanced prime because it is at equal distance from previous prime (331232249) and next prime (331232273).

It can be written as a sum of positive squares in only one way, i.e., 308669761 + 22562500 = 17569^2 + 4750^2 .

It is a cyclic number.

It is not a de Polignac number, because 331232261 - 2¹⁴ = 331215877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331232281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165616130 + 165616131.

It is an arithmetic number, because the mean of its divisors is an integer number (165616131).

Almost surely, 2^331232261 is an apocalyptic number.

It is an amenable number.

331232261 is a deficient number, since it is larger than the sum of its proper divisors (1).

331232261 is an equidigital number, since it uses as much as digits as its factorization.

331232261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 23.

The square root of 331232261 is about 18199.7873888680. The cubic root of 331232261 is about 691.9014005496.

Adding to 331232261 its reverse (162232133), we get a palindrome (493464394).

The spelling of 331232261 in words is "three hundred thirty-one million, two hundred thirty-two thousand, two hundred sixty-one".