231611461 has 2 divisors, whose sum is σ = 231611462. Its totient is φ = 231611460.

The previous prime is 231611437. The next prime is 231611477. The reversal of 231611461 is 164116132.

231611461 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 230098561 + 1512900 = 15169^2 + 1230^2 .

It is a cyclic number.

It is not a de Polignac number, because 231611461 - 2⁷ = 231611333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231611761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115805730 + 115805731.

It is an arithmetic number, because the mean of its divisors is an integer number (115805731).

Almost surely, 2^231611461 is an apocalyptic number.

It is an amenable number.

231611461 is a deficient number, since it is larger than the sum of its proper divisors (1).

231611461 is an equidigital number, since it uses as much as digits as its factorization.

231611461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 25.

The square root of 231611461 is about 15218.7864496483. The cubic root of 231611461 is about 614.1201519435.

Adding to 231611461 its reverse (164116132), we get a palindrome (395727593).

The spelling of 231611461 in words is "two hundred thirty-one million, six hundred eleven thousand, four hundred sixty-one".