83145257 has 8 divisors (see below), whose sum is σ = 91009800. Its totient is φ = 75490560.

The previous prime is 83145247. The next prime is 83145259. The reversal of 83145257 is 75254138.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 9803161 + 73342096 = 3131^2 + 8564^2 .

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 83145257 - 2¹² = 83141161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83145259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51632 + ... + 53217.

It is an arithmetic number, because the mean of its divisors is an integer number (11376225).

Almost surely, 2^83145257 is an apocalyptic number.

It is an amenable number.

83145257 is a deficient number, since it is larger than the sum of its proper divisors (7864543).

83145257 is a wasteful number, since it uses less digits than its factorization.

83145257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104923.

The product of its digits is 33600, while the sum is 35.

The square root of 83145257 is about 9118.4021078257. The cubic root of 83145257 is about 436.4613852291.

The spelling of 83145257 in words is "eighty-three million, one hundred forty-five thousand, two hundred fifty-seven".