83243515 has 4 divisors (see below), whose sum is σ = 99892224. Its totient is φ = 66594808.

The previous prime is 83243497. The next prime is 83243519. The reversal of 83243515 is 51534238.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 83243515 - 2⁵ = 83243483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83243519) 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 3 ways as a sum of consecutive naturals, for example, 8324347 + ... + 8324356.

It is an arithmetic number, because the mean of its divisors is an integer number (24973056).

Almost surely, 2^83243515 is an apocalyptic number.

83243515 is a deficient number, since it is larger than the sum of its proper divisors (16648709).

83243515 is a wasteful number, since it uses less digits than its factorization.

83243515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16648708.

The product of its digits is 14400, while the sum is 31.

The square root of 83243515 is about 9123.7884127154. The cubic root of 83243515 is about 436.6332488719.

The spelling of 83243515 in words is "eighty-three million, two hundred forty-three thousand, five hundred fifteen".