83117251 has 4 divisors (see below), whose sum is σ = 94991152. Its totient is φ = 71243352.

The previous prime is 83117227. The next prime is 83117299. The reversal of 83117251 is 15271138.

83117251 is nontrivially palindromic in base 9.

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 83117251 - 2¹⁷ = 82986179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83117351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5936940 + ... + 5936953.

It is an arithmetic number, because the mean of its divisors is an integer number (23747788).

Almost surely, 2^83117251 is an apocalyptic number.

83117251 is a deficient number, since it is larger than the sum of its proper divisors (11873901).

83117251 is a wasteful number, since it uses less digits than its factorization.

83117251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11873900.

The product of its digits is 1680, while the sum is 28.

The square root of 83117251 is about 9116.8662927565. The cubic root of 83117251 is about 436.4123749761.

Adding to 83117251 its reverse (15271138), we get a palindrome (98388389).

The spelling of 83117251 in words is "eighty-three million, one hundred seventeen thousand, two hundred fifty-one".