235231561 has 2 divisors, whose sum is σ = 235231562. Its totient is φ = 235231560.

The previous prime is 235231541. The next prime is 235231621. The reversal of 235231561 is 165132532.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154231561 + 81000000 = 12419^2 + 9000^2 .

It is a cyclic number.

It is not a de Polignac number, because 235231561 - 2⁹ = 235231049 is a prime.

It is not a weakly prime, because it can be changed into another prime (235231501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117615780 + 117615781.

It is an arithmetic number, because the mean of its divisors is an integer number (117615781).

Almost surely, 2^235231561 is an apocalyptic number.

It is an amenable number.

235231561 is a deficient number, since it is larger than the sum of its proper divisors (1).

235231561 is an equidigital number, since it uses as much as digits as its factorization.

235231561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5400, while the sum is 28.

The square root of 235231561 is about 15337.2605441780. The cubic root of 235231561 is about 617.3032027072.

The spelling of 235231561 in words is "two hundred thirty-five million, two hundred thirty-one thousand, five hundred sixty-one".