231225513161 has 2 divisors, whose sum is σ = 231225513162. Its totient is φ = 231225513160.

The previous prime is 231225513121. The next prime is 231225513187. The reversal of 231225513161 is 161315522132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202302048400 + 28923464761 = 449780^2 + 170069^2 .

It is a cyclic number.

It is not a de Polignac number, because 231225513161 - 2²⁶ = 231158404297 is a prime.

It is not a weakly prime, because it can be changed into another prime (231225513121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115612756580 + 115612756581.

It is an arithmetic number, because the mean of its divisors is an integer number (115612756581).

Almost surely, 2^231225513161 is an apocalyptic number.

It is an amenable number.

231225513161 is a deficient number, since it is larger than the sum of its proper divisors (1).

231225513161 is an equidigital number, since it uses as much as digits as its factorization.

231225513161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 32.

The spelling of 231225513161 in words is "two hundred thirty-one billion, two hundred twenty-five million, five hundred thirteen thousand, one hundred sixty-one".