108512561 has 2 divisors, whose sum is σ = 108512562. Its totient is φ = 108512560.

The previous prime is 108512549. The next prime is 108512633. The reversal of 108512561 is 165215801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97911025 + 10601536 = 9895^2 + 3256^2 .

It is a cyclic number.

It is not a de Polignac number, because 108512561 - 2⁶ = 108512497 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (108512861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54256280 + 54256281.

It is an arithmetic number, because the mean of its divisors is an integer number (54256281).

Almost surely, 2^108512561 is an apocalyptic number.

It is an amenable number.

108512561 is a deficient number, since it is larger than the sum of its proper divisors (1).

108512561 is an equidigital number, since it uses as much as digits as its factorization.

108512561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2400, while the sum is 29.

The square root of 108512561 is about 10416.9362578447. The cubic root of 108512561 is about 476.9724971580.

The spelling of 108512561 in words is "one hundred eight million, five hundred twelve thousand, five hundred sixty-one".