83503561 has 8 divisors (see below), whose sum is σ = 86796864. Its totient is φ = 80264880.

The previous prime is 83503559. The next prime is 83503577. The reversal of 83503561 is 16530538.

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 83503561 - 2¹ = 83503559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83503531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10525 + ... + 16666.

It is an arithmetic number, because the mean of its divisors is an integer number (10849608).

Almost surely, 2^83503561 is an apocalyptic number.

It is an amenable number.

83503561 is a deficient number, since it is larger than the sum of its proper divisors (3293303).

83503561 is a wasteful number, since it uses less digits than its factorization.

83503561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27311.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 83503561 is about 9138.0282884220. The cubic root of 83503561 is about 437.0874452128.

It can be divided in two parts, 8350 and 3561, that added together give a palindrome (11911).

The spelling of 83503561 in words is "eighty-three million, five hundred three thousand, five hundred sixty-one".