235131569 has 2 divisors, whose sum is σ = 235131570. Its totient is φ = 235131568.

The previous prime is 235131541. The next prime is 235131583. The reversal of 235131569 is 965131532.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 149328400 + 85803169 = 12220^2 + 9263^2 .

It is a cyclic number.

It is not a de Polignac number, because 235131569 - 2⁸ = 235131313 is a prime.

It is a super-2 number, since 2×235131569² = 110573709480803522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (235131469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117565784 + 117565785.

It is an arithmetic number, because the mean of its divisors is an integer number (117565785).

Almost surely, 2^235131569 is an apocalyptic number.

It is an amenable number.

235131569 is a deficient number, since it is larger than the sum of its proper divisors (1).

235131569 is an equidigital number, since it uses as much as digits as its factorization.

235131569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24300, while the sum is 35.

The square root of 235131569 is about 15334.0004238946. Note that the first 3 decimals coincide. The cubic root of 235131569 is about 617.2157227652.

The spelling of 235131569 in words is "two hundred thirty-five million, one hundred thirty-one thousand, five hundred sixty-nine".