88115561 has 2 divisors, whose sum is σ = 88115562. Its totient is φ = 88115560.

The previous prime is 88115477. The next prime is 88115569. The reversal of 88115561 is 16551188.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82446400 + 5669161 = 9080^2 + 2381^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-88115561 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (88115569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44057780 + 44057781.

It is an arithmetic number, because the mean of its divisors is an integer number (44057781).

Almost surely, 2^88115561 is an apocalyptic number.

It is an amenable number.

88115561 is a deficient number, since it is larger than the sum of its proper divisors (1).

88115561 is an equidigital number, since it uses as much as digits as its factorization.

88115561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9600, while the sum is 35.

The square root of 88115561 is about 9386.9889208414. The cubic root of 88115561 is about 444.9906339821.

The spelling of 88115561 in words is "eighty-eight million, one hundred fifteen thousand, five hundred sixty-one".