83267561 has 8 divisors (see below), whose sum is σ = 89934600. Its totient is φ = 76637952.

The previous prime is 83267549. The next prime is 83267579. The reversal of 83267561 is 16576238.

It can be written as a sum of positive squares in 4 ways, for example, as 1936 + 83265625 = 44^2 + 9125^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 83267561 - 2²⁶ = 16158697 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (83263561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4640 + ... + 13713.

It is an arithmetic number, because the mean of its divisors is an integer number (11241825).

Almost surely, 2^83267561 is an apocalyptic number.

It is an amenable number.

83267561 is a deficient number, since it is larger than the sum of its proper divisors (6667039).

83267561 is a wasteful number, since it uses less digits than its factorization.

83267561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18715.

The product of its digits is 60480, while the sum is 38.

The square root of 83267561 is about 9125.1060815752. The cubic root of 83267561 is about 436.6752872710.

The spelling of 83267561 in words is "eighty-three million, two hundred sixty-seven thousand, five hundred sixty-one".