403115561 has 2 divisors, whose sum is σ = 403115562. Its totient is φ = 403115560.

The previous prime is 403115519. The next prime is 403115597. The reversal of 403115561 is 165511304.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 314849536 + 88266025 = 17744^2 + 9395^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-403115561 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 403115561.

It is not a weakly prime, because it can be changed into another prime (403115161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201557780 + 201557781.

It is an arithmetic number, because the mean of its divisors is an integer number (201557781).

Almost surely, 2^403115561 is an apocalyptic number.

It is an amenable number.

403115561 is a deficient number, since it is larger than the sum of its proper divisors (1).

403115561 is an equidigital number, since it uses as much as digits as its factorization.

403115561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 403115561 is about 20077.7379452965. The cubic root of 403115561 is about 738.7143252709.

Adding to 403115561 its reverse (165511304), we get a palindrome (568626865).

The spelling of 403115561 in words is "four hundred three million, one hundred fifteen thousand, five hundred sixty-one".