83361521 has 2 divisors, whose sum is σ = 83361522. Its totient is φ = 83361520.

The previous prime is 83361517. The next prime is 83361529. The reversal of 83361521 is 12516338.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63425296 + 19936225 = 7964^2 + 4465^2 .

It is a cyclic number.

It is not a de Polignac number, because 83361521 - 2² = 83361517 is a prime.

It is not a weakly prime, because it can be changed into another prime (83361529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41680760 + 41680761.

It is an arithmetic number, because the mean of its divisors is an integer number (41680761).

Almost surely, 2^83361521 is an apocalyptic number.

It is an amenable number.

83361521 is a deficient number, since it is larger than the sum of its proper divisors (1).

83361521 is an equidigital number, since it uses as much as digits as its factorization.

83361521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 29.

The square root of 83361521 is about 9130.2530633055. The cubic root of 83361521 is about 436.8394752063.

Adding to 83361521 its reverse (12516338), we get a palindrome (95877859).

The spelling of 83361521 in words is "eighty-three million, three hundred sixty-one thousand, five hundred twenty-one".