82511761 has 8 divisors (see below), whose sum is σ = 87783264. Its totient is φ = 77286720.

The previous prime is 82511753. The next prime is 82511771. The reversal of 82511761 is 16711528.

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 82511761 - 2³ = 82511753 is a prime.

It is a super-2 number, since 2×82511761² = 13616381406642242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82511731) 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, 7915 + ... + 15088.

It is an arithmetic number, because the mean of its divisors is an integer number (10972908).

Almost surely, 2^82511761 is an apocalyptic number.

It is an amenable number.

82511761 is a deficient number, since it is larger than the sum of its proper divisors (5271503).

82511761 is a wasteful number, since it uses less digits than its factorization.

82511761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23231.

The product of its digits is 3360, while the sum is 31.

The square root of 82511761 is about 9083.5984609625. The cubic root of 82511761 is about 435.3500700763.

The spelling of 82511761 in words is "eighty-two million, five hundred eleven thousand, seven hundred sixty-one".